Biochemical Engineering

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Q. In fermentation kinetics, what does the term 'lag phase' refer to?
  • A. Rapid growth phase
  • B. Adaptation period
  • C. Stationary phase
  • D. Decline phase
Q. In which application are immobilized enzymes commonly used?
  • A. Biosensors
  • B. Drug synthesis
  • C. Food processing
  • D. All of the above
Q. In which condition is turbulent flow most likely to occur?
  • A. High viscosity
  • B. Low velocity
  • C. High flow rate
  • D. Small diameter
Q. In which scenario is agitation most critical?
  • A. During a routine check-up
  • B. In emergency resuscitation
  • C. For chronic pain management
  • D. In physical therapy
Q. What does Km represent in enzyme kinetics?
  • A. The maximum velocity of the reaction
  • B. The substrate concentration at which the reaction rate is half of Vmax
  • C. The rate constant of the reaction
  • D. The enzyme's affinity for the substrate
Q. What effect does increasing temperature generally have on enzyme activity?
  • A. Increases activity until a certain point
  • B. Decreases activity at all temperatures
  • C. Has no effect on activity
  • D. Increases activity indefinitely
Q. What effect does increasing the diameter of a blood vessel have on blood flow?
  • A. Decreases flow
  • B. Increases flow
  • C. No effect
  • D. Causes turbulence
Q. What effect does temperature have on immobilized enzyme activity?
  • A. No effect
  • B. Increases activity at all temperatures
  • C. Can denature the enzyme at high temperatures
  • D. Only affects free enzymes
Q. What is a common microorganism used in fermentation processes?
  • A. Escherichia coli
  • B. Staphylococcus aureus
  • C. Clostridium botulinum
  • D. Bacillus anthracis
Q. What is a potential risk of excessive agitation in a patient?
  • A. Increased medication absorption
  • B. Decreased risk of infection
  • C. Tissue damage
  • D. Improved respiratory function
Q. What is an enzyme's active site?
  • A. The part that binds to substrates
  • B. The part that provides energy
  • C. The part that stabilizes the enzyme
  • D. The part that transports products
Q. What is an immobilized enzyme?
  • A. An enzyme that is free in solution
  • B. An enzyme that is attached to a solid support
  • C. An enzyme that is inactive
  • D. An enzyme that is produced in large quantities
Q. What is enzyme inhibition?
  • A. The process of activating an enzyme
  • B. The process of increasing substrate concentration
  • C. The process of decreasing enzyme activity
  • D. The process of stabilizing enzyme structure
Q. What is one advantage of using immobilized enzymes in industrial processes?
  • A. Higher enzyme activity
  • B. Easier enzyme recovery
  • C. Lower production costs
  • D. Increased substrate specificity
Q. What is reverse osmosis primarily used for in water treatment?
  • A. Disinfection
  • B. Desalination
  • C. Fluoridation
  • D. pH adjustment
Q. What is the effect of agitation on blood samples during laboratory testing?
  • A. It has no effect
  • B. It can cause hemolysis
  • C. It improves sample quality
  • D. It decreases sample volume
Q. What is the effect of gravity on fluid flow in the human body?
  • A. Increases flow in all positions
  • B. Decreases flow in all positions
  • C. Varies with body position
  • D. Has no effect
Q. What is the effect of increasing substrate concentration on fermentation rate?
  • A. Increases indefinitely
  • B. Decreases
  • C. Increases to a point then levels off
  • D. Has no effect
Q. What is the effect of pH on enzyme activity?
  • A. Enzymes work best at any pH
  • B. Each enzyme has an optimal pH range
  • C. pH has no effect on enzyme activity
  • D. All enzymes are active at neutral pH only
Q. What is the effect of temperature on enzyme activity?
  • A. Increases indefinitely
  • B. Decreases indefinitely
  • C. Increases to an optimal point then decreases
  • D. Has no effect
Q. What is the main advantage of using a fed-batch fermentation process?
  • A. Higher yield
  • B. Lower cost
  • C. Faster fermentation
  • D. Easier to control pH
Q. What is the main advantage of using affinity chromatography?
  • A. Cost-effectiveness
  • B. High selectivity
  • C. Simplicity of operation
  • D. Speed of processing
Q. What is the main advantage of using recombinant DNA technology in biochemical engineering?
  • A. Increased production of natural products
  • B. Ability to produce proteins with modified properties
  • C. Reduction of production costs
  • D. Simplification of fermentation processes
Q. What is the main disadvantage of using chemical sterilants?
  • A. They are ineffective
  • B. They can be toxic
  • C. They are time-consuming
  • D. They are expensive
Q. What is the main goal of water treatment?
  • A. To make water taste better
  • B. To ensure water is safe for consumption
  • C. To increase water supply
  • D. To reduce water temperature
Q. What is the main product of lactic acid fermentation?
  • A. Ethanol
  • B. Carbon dioxide
  • C. Lactic acid
  • D. Acetic acid
Q. What is the minimum temperature and time required for effective steam sterilization in an autoclave?
  • A. 121°C for 15 minutes
  • B. 100°C for 30 minutes
  • C. 134°C for 10 minutes
  • D. 150°C for 5 minutes
Q. What is the primary component of blood that affects its flow properties?
  • A. Red blood cells
  • B. White blood cells
  • C. Platelets
  • D. Plasma
Q. What is the primary driving force for fluid flow in the circulatory system?
  • A. Osmotic pressure
  • B. Hydrostatic pressure
  • C. Viscosity
  • D. Surface tension
Q. What is the primary function of enzymes in biochemical reactions?
  • A. To increase the temperature of the reaction
  • B. To act as a substrate
  • C. To lower the activation energy
  • D. To change the equilibrium of the reaction
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