Q.1 What is a vaccine?
A medicine that cures diseases after they appear
A substance that trains the immune system to fight a specific disease
A type of electrical equipment used in hospitals
A device that measures heart rate
Explanation - A vaccine contains harmless parts of a pathogen or a weakened version of it to stimulate an immune response without causing illness.
Correct answer is: A substance that trains the immune system to fight a specific disease
Q.2 Which of the following is a common sensor used in medical devices?
Photodiode
Capacitor
Microphone
Resistor
Explanation - Photodiodes convert light signals into electrical signals and are frequently used in pulse oximeters and other biomedical sensors.
Correct answer is: Photodiode
Q.3 What is the main role of an antibody in the immune system?
To produce energy for the body
To destroy bacteria by absorbing nutrients
To recognize and bind to specific antigens
To transport oxygen in the blood
Explanation - Antibodies are Y-shaped proteins that bind to foreign antigens, marking them for destruction by other immune cells.
Correct answer is: To recognize and bind to specific antigens
Q.4 Which electronic component is essential for creating a simple timing circuit?
Transistor
Inductor
Resistor
Capacitor
Explanation - Capacitors store electrical energy and, when paired with resistors, can create RC time constants used in timing circuits.
Correct answer is: Capacitor
Q.5 In vaccine production, what is the purpose of cell culture?
To purify the vaccine after mixing
To grow viruses or bacteria in a controlled environment
To freeze the vaccine for storage
To test the vaccine on animals
Explanation - Cell culture allows pathogens to multiply in a medium that supports their growth, producing enough material for vaccine formulation.
Correct answer is: To grow viruses or bacteria in a controlled environment
Q.6 What is a microfluidic chip used for in vaccine development?
Measuring blood pressure
Mixing and analyzing tiny volumes of liquids rapidly
Storing large quantities of vaccine
Providing electrical power to a hospital
Explanation - Microfluidic chips enable precise handling of micro-liter volumes, speeding up assays and reducing reagent consumption.
Correct answer is: Mixing and analyzing tiny volumes of liquids rapidly
Q.7 Which signal processing technique helps filter noise from a sensor’s electrical output?
Fourier Transform
Binary Search
Modular Arithmetic
Linear Programming
Explanation - Fourier Transform decomposes signals into frequency components, allowing the removal of unwanted noise frequencies.
Correct answer is: Fourier Transform
Q.8 Which regulatory body approves vaccines for use in the United States?
WHO
FDA
CDC
NIH
Explanation - The U.S. Food and Drug Administration (FDA) evaluates vaccine safety, efficacy, and manufacturing quality before approval.
Correct answer is: FDA
Q.9 What does GMP stand for in vaccine production?
General Manufacturing Protocol
Good Manufacturing Practice
Global Medical Production
Genetic Material Processing
Explanation - GMP ensures that vaccines are consistently produced and controlled according to quality standards.
Correct answer is: Good Manufacturing Practice
Q.10 Which of the following best describes an electroporation device?
A tool that uses sound waves to sterilize cells
A device that applies brief electric pulses to cells to introduce DNA
A machine that monitors heart rhythms
A sensor that measures blood oxygen saturation
Explanation - Electroporation temporarily permeabilizes cell membranes using electric fields, allowing genetic material to enter cells for vaccine vector development.
Correct answer is: A device that applies brief electric pulses to cells to introduce DNA
Q.11 Which component in a microfluidic device controls the flow of liquids?
Valve
Transistor
Capacitor
Resistor
Explanation - Microfluidic valves regulate the movement and mixing of tiny fluid volumes within the chip.
Correct answer is: Valve
Q.12 What is the main purpose of a biosensor in vaccine quality control?
To produce vaccine components
To measure the electrical conductivity of vaccine solutions
To detect specific biomolecules indicating purity or potency
To sterilize the vaccine batch
Explanation - Biosensors translate a biological recognition event into an electrical signal, enabling rapid assessment of vaccine quality.
Correct answer is: To detect specific biomolecules indicating purity or potency
Q.13 Which of the following is an advantage of using a continuous flow bioreactor for vaccine production?
It eliminates the need for temperature control
It allows for constant product removal, reducing contamination risk
It produces more genetic material than batch reactors
It requires no monitoring equipment
Explanation - Continuous flow bioreactors enable steady-state operation and lower contamination chances compared to batch systems.
Correct answer is: It allows for constant product removal, reducing contamination risk
Q.14 What is the function of a cryopreservative in vaccine storage?
To increase the vaccine's potency
To prevent the vaccine from freezing
To preserve biological activity at low temperatures
To add color to the vaccine solution
Explanation - Cryopreservatives protect cells and proteins from damage during freezing and thawing cycles.
Correct answer is: To preserve biological activity at low temperatures
Q.15 Which type of sensor is commonly integrated into a wearable device for monitoring post-vaccination side effects?
Temperature sensor
Accelerometer
Infrared camera
Magnetometer
Explanation - Temperature sensors detect fever, a common side effect, allowing timely medical intervention.
Correct answer is: Temperature sensor
Q.16 How does an ELISA test help in vaccine efficacy studies?
By measuring blood pressure changes
By quantifying antibody concentrations in serum
By monitoring heart rhythm
By detecting genetic mutations
Explanation - ELISA (Enzyme-Linked Immunosorbent Assay) measures the amount of specific antibodies, indicating immune response strength.
Correct answer is: By quantifying antibody concentrations in serum
Q.17 What is the primary safety concern when using live attenuated vaccines?
They might not produce enough antibodies
They could revert to a pathogenic form
They are expensive to produce
They have short shelf life
Explanation - Live attenuated vaccines contain weakened pathogens that might regain virulence if not properly controlled.
Correct answer is: They could revert to a pathogenic form
Q.18 Which programming language is widely used for data analysis in vaccine development?
C++
Python
Fortran
Assembly
Explanation - Python offers libraries like pandas and NumPy that facilitate statistical analysis of immunological data.
Correct answer is: Python
Q.19 What is a key feature of a lab-on-a-chip device for vaccine screening?
Large sample volume requirement
Manual handling of reagents
High-throughput, low-volume testing
Requires no power supply
Explanation - Lab-on-a-chip devices automate assays with minimal reagent usage, accelerating screening processes.
Correct answer is: High-throughput, low-volume testing
Q.20 Which technique is used to create nanoparticles that can carry vaccine antigens?
Laser ablation
Spin coating
Sol-gel process
Electrospinning
Explanation - The sol-gel method produces silica-based nanoparticles suitable for antigen attachment and delivery.
Correct answer is: Sol-gel process
Q.21 Why is pH monitoring critical during vaccine fermentation?
To maintain the color of the solution
To regulate enzyme activity and cell growth
To ensure proper electrical conductivity
To measure oxygen consumption
Explanation - Optimal pH levels are essential for microbial metabolism and antigen production during fermentation.
Correct answer is: To regulate enzyme activity and cell growth
Q.22 Which component in a closed-loop bioprocessing system adjusts parameters automatically?
Manual operator
PID controller
External thermometer
Battery backup
Explanation - PID (Proportional-Integral-Derivative) controllers maintain setpoints by adjusting inputs in real-time.
Correct answer is: PID controller
Q.23 What role does a microfluidic mixer play in antibody production?
It provides electrical stimulation to cells
It homogenizes cell suspension and media
It sterilizes the culture medium
It cools the mixture to sub-zero temperatures
Explanation - Microfluidic mixers ensure even distribution of nutrients and cells, improving yield.
Correct answer is: It homogenizes cell suspension and media
Q.24 Which sensor would be most useful for detecting endotoxins in vaccine batches?
Glucose sensor
Optical biosensor
Magnetometer
Pressure sensor
Explanation - Optical biosensors can detect endotoxin levels through changes in light absorption or scattering.
Correct answer is: Optical biosensor
Q.25 What is a major advantage of using mRNA vaccines over traditional viral vector vaccines?
They integrate into the host genome
They require a cold chain of 4°C
They do not use live viruses, reducing safety concerns
They are produced in bacterial fermentation
Explanation - mRNA vaccines are non-replicating, eliminating the risk of reversion to virulence.
Correct answer is: They do not use live viruses, reducing safety concerns
Q.26 Which electrical component is essential for filtering electrical noise in a biosensor amplifier?
Capacitor
Diode
Transistor
Resistor
Explanation - Capacitors block DC while allowing AC signals, aiding in noise filtering.
Correct answer is: Capacitor
Q.27 What does a 3D printer add to the vaccine development process?
Rapid fabrication of custom microfluidic devices
Production of viral particles
Direct measurement of antibody levels
Manufacturing of syringes
Explanation - 3D printing enables on-demand creation of complex fluidic structures for research and diagnostics.
Correct answer is: Rapid fabrication of custom microfluidic devices
Q.28 Why is automation important in large-scale vaccine manufacturing?
It reduces manual labor costs only
It allows for faster vaccine research
It enhances consistency, reduces contamination, and increases throughput
It eliminates the need for quality control
Explanation - Automated systems maintain precise conditions and reduce human error, critical for large batch production.
Correct answer is: It enhances consistency, reduces contamination, and increases throughput
Q.29 Which type of analysis is used to assess the structural integrity of a vaccine antigen?
Spectroscopy
X-ray crystallography
Mass spectrometry
All of the above
Explanation - Spectroscopy, X-ray crystallography, and mass spectrometry provide complementary insights into protein structure.
Correct answer is: All of the above
Q.30 Which sensor technology can detect real-time changes in pH during fermentation?
Optical fiber pH sensor
Temperature probe
Pressure transducer
Humidity sensor
Explanation - Optical fiber pH sensors use fluorescence changes to measure acidity without direct contact.
Correct answer is: Optical fiber pH sensor
Q.31 What is the main benefit of using a microfluidic chip for vaccine potency testing?
It eliminates the need for any reagents
It allows rapid, low-volume assays with high reproducibility
It reduces the cost of vaccine production by 90%
It automatically approves vaccines for use
Explanation - Microfluidic platforms enable high-throughput testing with minimal sample usage and consistent results.
Correct answer is: It allows rapid, low-volume assays with high reproducibility
Q.32 In the context of vaccine delivery, what does a ‘nanoparticle carrier’ accomplish?
It serves as a marker for imaging
It protects antigens from degradation and enhances uptake by immune cells
It acts as an adjuvant that directly kills bacteria
It increases the viscosity of the vaccine solution
Explanation - Nanoparticles shield antigens, improve stability, and target antigen-presenting cells for better immunity.
Correct answer is: It protects antigens from degradation and enhances uptake by immune cells
Q.33 Which of the following is a major challenge when scaling up mRNA vaccine production?
Maintaining temperature stability during transport
Ensuring proper folding of lipid nanoparticles
Achieving high purity of the RNA
Both B and C
Explanation - Lipid nanoparticle formulation and RNA purification are critical to preserve mRNA integrity at scale.
Correct answer is: Both B and C
Q.34 What does the abbreviation LIMS stand for in the context of vaccine production?
Laboratory Information Management System
Linear Integrated Measurement System
Logistical Implementation Monitoring Service
Low-Intensity Microwave System
Explanation - LIMS manages sample tracking, data recording, and quality control in research and manufacturing labs.
Correct answer is: Laboratory Information Management System
Q.35 Which component is essential for creating a stable magnetic stirrer in a vaccine fermentation tank?
Electric motor
Magnet
Cooling fan
Light bulb
Explanation - The magnet inside the stirring bar provides torque when rotated by the external magnetic field of the stirrer.
Correct answer is: Magnet
Q.36 What does a 'bottleneck' refer to in vaccine manufacturing?
A type of packaging bottle
A point where production is slowed or limited
A chemical used in the vaccine
A machine that measures volume
Explanation - A bottleneck can arise from equipment, material shortages, or process constraints affecting output.
Correct answer is: A point where production is slowed or limited
Q.37 Which type of biosensor uses a biological recognition element to detect antigens in a vaccine?
Chemical sensor
Electrochemical sensor
Thermal sensor
Mechanical sensor
Explanation - Electrochemical biosensors often use antibodies or aptamers to produce measurable electrical changes upon antigen binding.
Correct answer is: Electrochemical sensor
Q.38 What does a 'bioreactor' primarily do in vaccine production?
Generates electricity for the plant
Cultures cells or microbes to produce vaccine antigens
Cools down the production facility
Measures vaccine potency
Explanation - Bioreactors provide controlled environments for large-scale cell or microbial growth.
Correct answer is: Cultures cells or microbes to produce vaccine antigens
Q.39 Which component of a microcontroller is responsible for handling input and output signals?
Memory
GPIO pins
Clock oscillator
Power supply
Explanation - General-Purpose Input/Output pins allow the microcontroller to interface with sensors and actuators.
Correct answer is: GPIO pins
Q.40 Which of these is a common method for sterilizing vaccine solution?
Filtration
Irradiation
Autoclaving
All of the above
Explanation - Filtration, radiation, and heat methods are all employed to eliminate contaminants from vaccines.
Correct answer is: All of the above
Q.41 What is the purpose of an adjuvant in a vaccine?
To act as a preservative
To enhance the immune response to the antigen
To sterilize the vaccine
To reduce manufacturing cost
Explanation - Adjuvants boost the body's immunogenic reaction, improving vaccine efficacy.
Correct answer is: To enhance the immune response to the antigen
Q.42 Which device is used to measure the temperature inside a vaccine vial during transport?
Thermocouple probe
Barometer
Anemometer
Thermometer with digital readout
Explanation - Digital thermometers provide accurate, real-time temperature data essential for cold-chain monitoring.
Correct answer is: Thermometer with digital readout
Q.43 What is the main difference between a batch bioprocess and a continuous bioprocess?
Batch processes use bacteria; continuous uses viruses
Batch processes are done in stages; continuous processes run nonstop
Batch processes are cheaper than continuous
Batch processes cannot be automated
Explanation - Continuous processes maintain a steady flow of inputs and outputs, improving efficiency over discrete batch cycles.
Correct answer is: Batch processes are done in stages; continuous processes run nonstop
Q.44 Which technique is used for separating proteins based on size during vaccine purification?
Gel filtration chromatography
Mass spectrometry
Western blotting
PCR
Explanation - Size-exclusion chromatography separates molecules according to their hydrodynamic volume.
Correct answer is: Gel filtration chromatography
Q.45 Which of the following best describes a 'good manufacturing practice' (GMP) requirement?
All equipment must be made of stainless steel
Quality control processes must be documented and followed
Only trained personnel can handle vaccines
Manufacturing must occur in a cleanroom
Explanation - GMP mandates rigorous documentation and adherence to quality standards for safety and efficacy.
Correct answer is: Quality control processes must be documented and followed
Q.46 What does a 'pseudovirus' provide in vaccine research?
A live virus that can be studied safely
A harmless viral vector used to study viral entry mechanisms
A type of bacteria that produces antigens
An alternative name for the vaccine itself
Explanation - Pseudoviruses mimic the target virus’s surface proteins without the full pathogenic genome, enabling safe research.
Correct answer is: A harmless viral vector used to study viral entry mechanisms
Q.47 Which component is essential for a closed-loop feedback system in bioreactor temperature control?
Temperature sensor
Manual operator
Power supply
Valve
Explanation - The sensor provides real-time data to the controller to adjust heating/cooling as needed.
Correct answer is: Temperature sensor
Q.48 Which technique can quickly quantify RNA vaccine dosage?
ELISA
RT-qPCR
Gel electrophoresis
Spectrophotometry
Explanation - Reverse transcription quantitative PCR amplifies and measures RNA levels accurately.
Correct answer is: RT-qPCR
Q.49 Which device is commonly used to monitor oxygen levels in a bioreactor?
pH meter
Optical oxygen sensor
Temperature probe
Pressure gauge
Explanation - Optical sensors use fluorescence quenching to measure dissolved oxygen accurately.
Correct answer is: Optical oxygen sensor
Q.50 Why is a 'cleanroom' necessary in vaccine manufacturing?
To keep the environment free of dust and airborne microbes
To allow for higher temperatures
To reduce noise levels
To provide natural light for workers
Explanation - Cleanrooms maintain controlled particle counts, ensuring product sterility.
Correct answer is: To keep the environment free of dust and airborne microbes
Q.51 Which of the following is a key advantage of a microfluidic device over a conventional plate assay?
Higher volume requirement
Reduced reagent consumption and faster turnaround
Higher cost
Requires manual pipetting
Explanation - Microfluidics process tiny volumes, speeding assays and saving resources.
Correct answer is: Reduced reagent consumption and faster turnaround
Q.52 Which parameter is monitored to ensure vaccine potency during storage?
pH
Temperature
Oxygen level
All of the above
Explanation - Each parameter can influence the stability and effectiveness of the vaccine.
Correct answer is: All of the above
Q.53 What is the main purpose of a 'cryostat' in vaccine research?
To freeze samples for long-term storage
To heat samples quickly
To measure pH
To detect proteins
Explanation - Cryostats maintain extremely low temperatures, preserving biological samples.
Correct answer is: To freeze samples for long-term storage
Q.54 Which of these sensors is most suitable for detecting moisture levels in a vaccine packaging environment?
Humidity sensor
Temperature sensor
pH sensor
Pressure sensor
Explanation - Humidity sensors monitor moisture to prevent degradation or contamination.
Correct answer is: Humidity sensor
Q.55 Which computational method is often used to predict protein folding for vaccine antigens?
Monte Carlo simulation
Finite element analysis
Molecular dynamics
Discrete Fourier transform
Explanation - Molecular dynamics simulations model the physical movements of atoms over time, predicting folding pathways.
Correct answer is: Molecular dynamics
Q.56 In vaccine formulation, what is the purpose of a stabilizer?
To act as an adjuvant
To maintain antigen structure during freezing and thawing
To increase the vaccine's potency
To color the solution
Explanation - Stabilizers protect proteins from denaturation during temperature fluctuations.
Correct answer is: To maintain antigen structure during freezing and thawing
Q.57 Which type of sensor could be used to detect contamination in a vaccine vial during filling?
Chemical sensor for bacterial metabolites
Light sensor for color change
Magnetic sensor for weight
Pressure sensor
Explanation - Chemical biosensors can detect metabolic byproducts indicative of contamination.
Correct answer is: Chemical sensor for bacterial metabolites
Q.58 Which process is essential to remove residual host cell proteins after virus purification?
Dialysis
Affinity chromatography
Sonication
Heat shock
Explanation - Affinity chromatography uses specific interactions to selectively isolate desired proteins, removing contaminants.
Correct answer is: Affinity chromatography
Q.59 What is the primary function of a 'flow cytometer' in vaccine development?
To count and analyze cells in a fluid based on fluorescence
To measure the viscosity of a solution
To detect temperature changes
To mix reagents automatically
Explanation - Flow cytometers analyze thousands of cells per second, identifying cell populations and markers.
Correct answer is: To count and analyze cells in a fluid based on fluorescence
Q.60 Which of the following best describes a 'digital twin' in vaccine manufacturing?
A clone of the vaccine used for testing
A virtual replica of the manufacturing process for simulation and optimization
A real-time copy of the production line
A duplicate of the production equipment
Explanation - Digital twins model processes in software, enabling predictive maintenance and process improvement.
Correct answer is: A virtual replica of the manufacturing process for simulation and optimization
Q.61 Which sensor technology can detect the presence of endotoxins by measuring changes in light scattering?
Optical biosensor
Thermal sensor
Acoustic sensor
Capacitance sensor
Explanation - Optical biosensors can monitor scattering or absorbance changes upon endotoxin binding.
Correct answer is: Optical biosensor
Q.62 What does the abbreviation 'RT-PCR' stand for?
Reverse Transcription Polymerase Chain Reaction
Rapid Thermal Polymerase Chain Reaction
Radioactive Thermocycler Polymerase Reaction
Random Target Protein Chain Reaction
Explanation - RT-PCR converts RNA into DNA and amplifies it for detection, commonly used for viral diagnostics.
Correct answer is: Reverse Transcription Polymerase Chain Reaction
Q.63 Which type of vaccine uses a killed virus?
Live attenuated
Inactivated
Subunit
DNA vaccine
Explanation - Inactivated vaccines contain viruses that have been killed or chemically treated to eliminate infectivity.
Correct answer is: Inactivated
Q.64 What is the purpose of a 'pH indicator' in a vaccine vial?
To show the vaccine's color change upon expiration
To indicate if the vaccine’s acidity is within safe range
To act as a preservative
To measure temperature
Explanation - pH indicators change color when the solution shifts outside the acceptable pH range for vaccine stability.
Correct answer is: To indicate if the vaccine’s acidity is within safe range
Q.65 Which component of a microcontroller is used to read analog signals from sensors?
ADC (Analog to Digital Converter)
GPIO
DAC
Timer
Explanation - ADC converts analog voltages into digital values the microcontroller can process.
Correct answer is: ADC (Analog to Digital Converter)
Q.66 What does 'batch size' refer to in vaccine production?
The amount of vaccine produced in a single manufacturing cycle
The number of vials produced per day
The volume of raw materials used
The size of the production facility
Explanation - Batch size determines how many doses are produced before the process is halted for cleaning or restart.
Correct answer is: The amount of vaccine produced in a single manufacturing cycle
Q.67 Which of these is a method for detecting viral RNA in vaccine samples?
ELISA
Northern blotting
RT-PCR
Mass spectrometry
Explanation - RT-PCR is the gold standard for sensitive detection of viral RNA sequences.
Correct answer is: RT-PCR
Q.68 Which type of valve is typically used in a bioreactor to control the flow of liquid media?
Ball valve
Check valve
Solenoid valve
Butterfly valve
Explanation - Solenoid valves provide rapid, electrically controlled flow regulation in automated systems.
Correct answer is: Solenoid valve
Q.69 What is the purpose of an 'autoclave' in vaccine manufacturing?
To freeze vaccine vials
To sterilize equipment and media by high pressure steam
To measure vaccine potency
To filter out impurities
Explanation - Autoclaving eliminates microorganisms using steam under pressure, ensuring aseptic conditions.
Correct answer is: To sterilize equipment and media by high pressure steam
Q.70 Which sensor provides real-time data on the temperature inside a vaccine transport cooler?
Thermocouple
Barometer
Humidity sensor
Light sensor
Explanation - Thermocouples convert temperature differences into voltage signals, giving accurate temperature readings.
Correct answer is: Thermocouple
Q.71 Which component in a microfluidic chip is used to create droplets for encapsulating vaccine antigens?
Mixing chamber
T-junction
Valve
Reservoir
Explanation - T-junctions combine two streams to form droplets, enabling controlled encapsulation of antigens.
Correct answer is: T-junction
Q.72 What is the main advantage of using a subunit vaccine?
It contains the whole virus
It uses only specific viral proteins, reducing side effects
It is cheaper to produce
It can be administered orally
Explanation - Subunit vaccines present selected antigens, minimizing the risk of adverse reactions.
Correct answer is: It uses only specific viral proteins, reducing side effects
Q.73 Which of the following is an example of a 'biosensor' used in vaccine potency testing?
Electrochemical impedance spectroscopy sensor
Thermal conductivity sensor
Acoustic sensor
Pressure sensor
Explanation - EIS sensors measure changes in impedance due to antigen-antibody interactions, indicating potency.
Correct answer is: Electrochemical impedance spectroscopy sensor
Q.74 What is a 'heat shock protein' used for in vaccine development?
To act as an adjuvant by stimulating the immune system
To kill residual microbes
To provide structural support
To measure temperature during production
Explanation - Heat shock proteins can enhance immune responses when fused to antigens.
Correct answer is: To act as an adjuvant by stimulating the immune system
Q.75 Which of the following best describes the role of a 'cleanroom' in vaccine production?
A place to store finished vaccines
An environment with controlled particulate and microbial levels
A place for workers to rest
A site for testing vaccine potency
Explanation - Cleanrooms reduce contamination risk during critical manufacturing steps.
Correct answer is: An environment with controlled particulate and microbial levels
Q.76 What is the purpose of a 'filtration membrane' in the downstream processing of a vaccine?
To sterilize the final product
To separate proteins by size
To cool down the solution
To measure pH
Explanation - Ultrafiltration membranes remove microorganisms, ensuring product sterility.
Correct answer is: To sterilize the final product
Q.77 Which type of sensor is commonly used to measure the oxygen level in a bioreactor?
pH sensor
Oxygen sensor
Temperature sensor
Humidity sensor
Explanation - Oxygen sensors monitor dissolved oxygen, critical for cell metabolism in bioreactors.
Correct answer is: Oxygen sensor
Q.78 What is the main function of a 'syringe filter' in vaccine preparation?
To add preservatives
To remove particulate contaminants
To measure dose volume
To sterilize the vaccine
Explanation - Syringe filters trap particles, ensuring a clear, contaminant-free vaccine solution.
Correct answer is: To remove particulate contaminants
Q.79 Which of the following is a critical quality attribute (CQA) for a vaccine?
Potency
Color
Manufacturer’s logo
Packaging material
Explanation - Potency indicates the vaccine’s ability to induce the desired immune response.
Correct answer is: Potency
Q.80 Which sensor could detect a sudden rise in temperature within a vaccine storage unit?
Thermocouple
Pressure gauge
Light sensor
Magnetometer
Explanation - Thermocouples provide real-time temperature monitoring to prevent vaccine spoilage.
Correct answer is: Thermocouple
Q.81 What does 'GMP' stand for in vaccine manufacturing?
General Manufacturing Practices
Good Manufacturing Practices
Global Medical Production
Genetic Modification Procedure
Explanation - GMP ensures quality, safety, and consistency of pharmaceutical products.
Correct answer is: Good Manufacturing Practices
Q.82 Which component of a microfluidic device helps mix two fluids quickly?
Microvalve
T-junction
Micropump
Microheater
Explanation - A T-junction merges two fluid streams, creating a fast mix for reactions.
Correct answer is: T-junction
Q.83 What is a 'shelf life' of a vaccine?
The time the vaccine can be stored before it spoils
The duration it takes to produce one batch
The time a worker can spend on the job
The amount of vaccine in one vial
Explanation - Shelf life indicates how long a vaccine remains effective under recommended conditions.
Correct answer is: The time the vaccine can be stored before it spoils
Q.84 Which sensor type measures the voltage change caused by the movement of an electrical charge?
Electrochemical sensor
Thermal sensor
Acoustic sensor
Photometric sensor
Explanation - Electrochemical sensors detect electrical signals produced by redox reactions of analytes.
Correct answer is: Electrochemical sensor
Q.85 What is the main reason to use a 'microbial fermenter' in vaccine production?
To produce heat
To grow cells that produce antigens
To filter the vaccine
To sterilize the room
Explanation - Fermenters cultivate cells or microbes that generate the antigens needed for vaccines.
Correct answer is: To grow cells that produce antigens
Q.86 Which of these devices is used to ensure the temperature in a vaccine vial does not exceed 10°C?
Thermocouple
Oxygen sensor
pH meter
Pressure gauge
Explanation - Thermocouples monitor temperature accurately, preventing overheating during storage.
Correct answer is: Thermocouple
Q.87 Which of the following is a common method to remove impurities from vaccine solutions?
Gel filtration chromatography
Thermal imaging
X-ray diffraction
Electroplating
Explanation - Gel filtration separates molecules by size, removing impurities while retaining antigens.
Correct answer is: Gel filtration chromatography
Q.88 Which type of sensor is used to detect the presence of endotoxins in a liquid sample?
Optical sensor
Acoustic sensor
Thermal sensor
Pressure sensor
Explanation - Optical sensors can detect endotoxin-induced changes in light scattering or fluorescence.
Correct answer is: Optical sensor
Q.89 What is a 'lab-on-a-chip' primarily used for in vaccine research?
Storing vaccines
Automating small-scale assays quickly
Heating samples
Delivering vaccines to patients
Explanation - Lab-on-a-chip devices perform rapid diagnostics and assays on a tiny platform.
Correct answer is: Automating small-scale assays quickly
Q.90 Which process step involves the separation of vaccine antigens from the growth medium?
Filtration
Chromatography
Heating
Cooling
Explanation - Chromatography isolates antigens by exploiting their unique interactions with stationary phases.
Correct answer is: Chromatography
Q.91 Which component in a microcontroller controls the timing of operations?
Oscillator
Timer
ADC
GPIO
Explanation - Timers generate precise timing signals for scheduling tasks in the microcontroller.
Correct answer is: Timer
Q.92 What is the purpose of adding a 'preservative' to a vaccine?
To increase potency
To prevent microbial growth
To change color
To reduce cost
Explanation - Preservatives inhibit bacteria or fungi from contaminating the vaccine during storage.
Correct answer is: To prevent microbial growth
Q.93 Which of the following is a key advantage of microfluidic devices over conventional batch reactors?
Higher volume throughput
Longer reaction times
Reduced reagent usage and faster analysis
Higher cost
Explanation - Microfluidics enable precise handling of small volumes, speeding up experiments.
Correct answer is: Reduced reagent usage and faster analysis
Q.94 Which type of sensor can directly measure the amount of protein in a vaccine solution?
Spectrophotometer
Thermocouple
Acoustic sensor
Pressure gauge
Explanation - Spectrophotometers quantify protein concentration by measuring absorbance at specific wavelengths.
Correct answer is: Spectrophotometer
Q.95 Which component in a bioprocess control system provides feedback to maintain pH levels?
pH sensor
Temperature sensor
Pressure sensor
Humidity sensor
Explanation - pH sensors give real-time data that control acid/base addition to keep pH stable.
Correct answer is: pH sensor
Q.96 What is the main benefit of using an 'electrochemical impedance spectroscopy' (EIS) sensor in vaccine quality control?
It detects temperature changes
It measures the electrical impedance changes upon antigen-antibody binding
It monitors light scattering
It measures pressure
Explanation - EIS detects binding events by monitoring impedance variations, indicating vaccine potency.
Correct answer is: It measures the electrical impedance changes upon antigen-antibody binding
Q.97 Which of the following is NOT a common method for vaccine antigen purification?
Affinity chromatography
Gel filtration
Sonication
Thin-layer chromatography
Explanation - Sonication is a physical disruption technique, not a purification method.
Correct answer is: Sonication
Q.98 What role does a 'PID controller' play in a vaccine bioreactor?
It provides power supply
It maintains temperature and pH by adjusting inputs based on error
It measures oxygen concentration
It filters the product
Explanation - PID controllers use proportional, integral, and derivative actions to keep process variables steady.
Correct answer is: It maintains temperature and pH by adjusting inputs based on error
Q.99 Which technique is used to determine the 3D structure of a vaccine antigen?
X-ray crystallography
PCR
ELISA
Microscopy
Explanation - X-ray crystallography reveals atomic-level structures of proteins critical for vaccine design.
Correct answer is: X-ray crystallography
Q.100 What does the abbreviation 'LIMS' stand for in vaccine production?
Laboratory Information Management System
Liquid Intensity Measurement System
Light Intensity Monitoring Station
Local Industrial Manufacturing Standard
Explanation - LIMS manages sample tracking, data logging, and quality control in labs.
Correct answer is: Laboratory Information Management System
Q.101 Which of the following best describes a 'digital twin' in the context of vaccine manufacturing?
A physical duplicate of the production line
A virtual replica of the manufacturing process for simulation and optimization
A backup computer system
An identical copy of the vaccine formulation
Explanation - Digital twins model real processes, allowing predictive maintenance and process refinement.
Correct answer is: A virtual replica of the manufacturing process for simulation and optimization
Q.102 Which sensor technology can detect endotoxins by measuring changes in light scattering?
Optical biosensor
Thermal sensor
Acoustic sensor
Capacitance sensor
Explanation - Optical biosensors detect endotoxin-induced changes in light scattering or fluorescence.
Correct answer is: Optical biosensor
Q.103 What does a 'flow cytometer' do in vaccine research?
Counts and analyzes cells in a fluid based on fluorescence
Measures the viscosity of a solution
Detects temperature changes
Mixes reagents automatically
Explanation - Flow cytometers process thousands of cells per second, identifying cell populations and markers.
Correct answer is: Counts and analyzes cells in a fluid based on fluorescence
Q.104 What is a key challenge in scaling up mRNA vaccine production?
Ensuring proper folding of lipid nanoparticles
Maintaining RNA purity
Both A and B
None of the above
Explanation - Proper lipid nanoparticle formulation and RNA purification are essential to preserve mRNA integrity at scale.
Correct answer is: Both A and B
Q.105 Which sensor technology is commonly used for real-time temperature monitoring inside a vaccine cooler?
Thermocouple
Acoustic sensor
Light sensor
Magnetometer
Explanation - Thermocouples provide accurate temperature readings essential for maintaining vaccine stability.
Correct answer is: Thermocouple
Q.106 Which component in a microfluidic device is essential for generating droplets for encapsulating vaccine antigens?
T-junction
Valve
Reservoir
Mixing chamber
Explanation - T-junctions merge two fluid streams, producing droplets that can encapsulate antigens.
Correct answer is: T-junction
Q.107 What is the main role of an adjuvant in a vaccine?
To act as a preservative
To enhance the immune response to the antigen
To sterilize the vaccine
To color the solution
Explanation - Adjuvants boost the body's immune response, improving vaccine efficacy.
Correct answer is: To enhance the immune response to the antigen
Q.108 Which of the following best describes a 'purification column' in vaccine production?
A filter that removes all particles
A chromatographic column that separates components based on affinity or size
A container for storing raw materials
A device that heats the vaccine
Explanation - Purification columns isolate antigens from impurities using specific interactions.
Correct answer is: A chromatographic column that separates components based on affinity or size
Q.109 Which of the following is a method to assess vaccine potency?
ELISA
Thermocouple measurement
Acoustic sensing
Temperature logging
Explanation - ELISA quantifies specific antibodies or antigens to determine vaccine potency.
Correct answer is: ELISA
Q.110 What does a 'bipolar membrane' do in a microfluidic device?
Generates heat
Separates two fluids
Acts as a power source
Filters particles
Explanation - A bipolar membrane can create distinct microenvironments within the same device.
Correct answer is: Separates two fluids
Q.111 What is the main advantage of using a subunit vaccine?
Contains the whole virus
Uses only specific viral proteins, reducing side effects
Cheaper to produce
Can be administered orally
Explanation - Subunit vaccines present selected antigens, minimizing adverse reactions.
Correct answer is: Uses only specific viral proteins, reducing side effects
Q.112 Which sensor measures the electrical impedance of a liquid sample?
EIS sensor
Thermal sensor
Acoustic sensor
Barometer
Explanation - EIS sensors detect changes in impedance caused by biomolecular interactions.
Correct answer is: EIS sensor
Q.113 What does the term 'sterile filtration' refer to?
Removing particles larger than 0.45 micrometers
Removing particles smaller than 0.2 micrometers
Sterilizing the air
Cooling the product
Explanation - Sterile filtration uses 0.2 µm filters to eliminate microbes while maintaining product integrity.
Correct answer is: Removing particles smaller than 0.2 micrometers