When Probability Tables are examined it is found that Factors A, B and F show large effects which are very significant, whereas C shows a very low effect which is not significant and D shows ___________________

• A) normal effect
• B) no effect
• C) least effect
• D) huge effect

Oxygen Transfer Process through air bubble is consist of how many steps?

• A) 7
• B) 9
• C) 6
• D) 8

The oxygen demand of an industrial fermentation process is normally satisfied by ____________ the fermentation broth.

• A) agitating
• B) aerating and agitating
• C) Peptones
• D) aerating

Maximum biomass production may be achieved by satisfying the organism's maximum specific _______________ demand by maintaining the dissolved oxygen concentration greater than the critical level.

• A) NaCl
• B) SnCl2
• C) MgCl2
• D) oxygen

NCTC stands for ____________?

• A) National Collection of Type citation
• B) National Collection of Typical cultures
• C) National Collection of Type cultures
• D) National collect of Type cultures

If during fermentation the dissolved oxygen concentration were to fall below the critical level then the cells may be metabolically _________________.

• A) increase
• B) disturbed
• C) Magnetodynamic
• D) decrease

It may be seen that the specific oxygen uptake rate increases with increase in the dissolved oxygen concentration up to a certain point called

• A) C critical
• B) All of these
• C) O critical
• D) T critical

Aeration refers to the process of introducing _______________ to increase oxygen concentration in liquids.

• A) hydrogen
• B) air
• C) nitrogen
• D) neon

Which of the following is not a non-essential mineral?

• A) Molybdenum
• B) Cobalt
• C) Iron
• D) Calcium

From Darlington's and Johnson's equations (in above mentioned Table) it may be seen that the production of 100 grams of biomass from hydrocarbon requires approximately_______________ the amount of oxygen to produce the same amount of biomass from carbohydrate.

• A) two times
• B) four times
• C) five times
• D) three times

Which of the following is not the component of aeration and agitation system?

• A) Impeller
• B) Baffles
• C) Stirrer gland and bearing
• D) Thermometer

In Henry’s Law, the the oxygen saturation concentration of the nutrient solution is represented by

• A) None of these
• B) O*
• C) H*
• D) C*

An ideal anti foam should be __________ to the micro-organism.

• A) Rheology
• B) non-toxic
• C) Fast
• D) Antifoams

Methylotrophic yeasts such as Hansenula polymorpha and Pichia pastoris may be used as alternative systems because of the presence of an ____________ promoter.

• A) alcohol oxidase
• B) Dry heat
• C) oxidase
• D) alcohol

Inhibitor for Citric acid is ________________

• A) Alkali metal/ phosphate, pH below 2.0
• B) hydrogen
• C) Surgical sterilization
• D) Disinfection

Important factor in a fermenters is provision for adequate __________ of its contents.

• A) mixing
• B) carbon mass transfer coefficient
• C) nutrient mass transfer coefficient
• D) nitrogen mass transfer coefficient

The solubility of oxygen decreases as with ____________ temperature and concentration of solutes in the solution.

• A) constant
• B) medium
• C) decreasing
• D) increasing

In fermentation DOT stands for ________?

• A) dissolved oxygen tensioning
• B) dissolving oxygen tension
• C) dissolved oxygen track
• D) dissolved oxygen tension

Growth period of the culture is ______________

• A) Isolation
• B) Inoculation
• C) Incubation
• D) Incineration

pH is the measurement of _________

• A) concentration of OH+
• B) concentration of OH–
• C) concentration of H–
• D) concentration of H+