Questions and answers for exam Preparation

MCQs

Total Questions : 146 | Page 1 of 15 pages

Question 1. In the stationary phase

growth is proportional to death
growth rate is equal to death rate
growth rate is lesser than death rate
no co-relation exist between death rate and growth rate

Discuss Question

Answer: Option B. -> growth rate is equal to death rate
Answer: (b).growth rate is equal to death rate

Question 2. Which of the following is an example of a mathematical model?

Volume of cuboid = length x breadth x height
The Monod Model
The Michaelis Menten Equation
All of the above

Discuss Question

Answer: Option D. -> All of the above
Answer: (d).All of the above

Question 3. Biomass concentrations during fermentation is

diluting the samples to optical density less than 0.3
monitored by controlling the changes in biomass concentrations
considering that optical density is proportional to the surface area of the biomass in the sample
all of the above

Discuss Question

Answer: Option D. -> all of the above
Answer: (d).all of the above

Question 4. During the exponential phase the maximum specific growth rate equals specific growth rate as

concentration of the growth limiting substrate is much less than the monod constant
concentration of growth limiting substrate is much greater than the monod constant
specific growth rate increases exponentially
concentration of the growth limiting substrate is equal to the monod constant

Discuss Question

Answer: Option B. -> concentration of growth limiting substrate is much greater than the monod constant
Answer: (b).concentration of growth limiting substrate is much greater than the monod constant

Question 5. Chemostats work on the principle of

maintaining constant volume of culture medium
maintaining continuous flow of nutrients
maintaining uniform nutrients concentration
operating at higher pressure

Discuss Question

Answer: Option C. -> maintaining uniform nutrients concentration
Answer: (c).maintaining uniform nutrients concentration

Question 6. Which of the following(s) is/are considered the limitations of the exponential growth model?

Only predicts that cells grow exponentially during the log phase
It does not consider factors that causes cells growth to stop or slow
Predicts cell growth at a linear rate
All of the above

Discuss Question

Answer: Option B. -> It does not consider factors that causes cells growth to stop or slow
Answer: (b).It does not consider factors that causes cells growth to stop or slow

Question 7. During the lag phase

cells just start growing
cells synthesize new proteins and membrane components
cells produce antibiotics to kill competing organisms
cells simply grow slowly

Discuss Question

Answer: Option B. -> cells synthesize new proteins and membrane components
Answer: (b).cells synthesize new proteins and membrane components

Question 8. Concentration of the growth limiting substrate means

trace elements concentration
the concentration of the substrate that controls the growth rate of the cells
sugar concentration in the fermentation medium
dissolved oxygen concentration

Discuss Question

Answer: Option B. -> the concentration of the substrate that controls the growth rate of the cells
Answer: (b).the concentration of the substrate that controls the growth rate of the cells

Question 9. To describe components of an airlift bioreactor which of the follow-ings are generally included?