200 Best MCQs on Fermentation kinetics- biochemical engineering
Q41). A functional relationship between the specific growth rate and essential compounds concentration was proposed by Monod in
a).1958
b).1946
c).1942
d).1950
Correct Answer:
1942
Explaination:
Q42). The optical density sometimes drops during the lag phase because
a).cells tend to grow without dividing leading to a decrease in the surface area to volume ratio
b).of fast cell growth causing them to fill up with DNA
c).cells swell up with water
d).cells swell up with RNA
Correct Answer:
cells tend to grow without dividing leading to a decrease in the surface area to volume ratio
Explaination:
Q43). The application of just in time (JIT) manufacturing techniques in biotechnology is important because
a).raw materials used in biotechnology are biodegradable
b).the products of biotechnology are biodegradable
c).it is a very competitive business (d) all of the above
d).all of the above
Correct Answer:
all of the above
Explaination:
Q44). Residence time distribution (RTD) of a reactor is independent of
a).micro mixing
b).volume of reactor
c).height of the reactor
d).width of the reactor
Correct Answer:
micro mixing
Explaination:
Q45). The bubble column fermenter is usually limited to
a).aerobic fermentations
b).anaerobic fermentations
c).Both (a) and (b)
d).facultative fermentation
Correct Answer:
aerobic fermentations
Explaination:
Q46). A culture in a closed vessel to which no additional medium is added and from which no waste products are removed is called a __________ culture.
a).continuous
b).batch
c).fed-batch
d).semi continuous
Correct Answer:
batch
Explaination:
Q47). The diameter of the baffles in a standard stirred tank bioreactor ranges from
a).1/10 – 1/12 of the tank diameter
b).1/3 – 1/4 of the tank diameter
c).1/15 – 1/20 of the tank diameter
d).1/20 – 1/25 of the tank diameter
Correct Answer:
1/10 – 1/12 of the tank diameter
Explaination:
Q48). During the log phase cell numbers increase exponentially
a).because cells produce enzymes
b).because cells do not have cell membranes
c).because cells are autocatalysts
d).because the rate of cell division increases exponentially
Correct Answer:
because cells are autocatalysts
Explaination: