ETHANOL PRODUCTION QUIZ

S cerevisiae start producing ethanol with in

24 h

12 h

10 h

15 h

TRUE ANSWER : ?
YOUR ANSWER : ?

To maintain aseptic conditions during fermentation which of the following is needed?

All of these

Sterilization of air supply

Aeration and agitation

Sterilization of fermentor

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following microorganisms help in the ethanol production?

Saccharomyces cerevisiae

Zygomonas mobilis

Saccharomyces uvarum

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following organism is not used in any of the traditional industrial fermentation?

Bacillus

E. coli

Yeast

Pseudomonas

TRUE ANSWER : ?
YOUR ANSWER : ?

The Zygomonas has a merit over yeast because

it has high tolerance to ethanol

it has more osmotic tolerance to higher sugar concentration

All of these

it has more specific growth rate

TRUE ANSWER : ?
YOUR ANSWER : ?

As the fermentation for the ethanol production is over, the cells are separated to get the biomass of yeast cells that is used

All of these

as manure

as single cell protein for animal feed

for next fermentation

TRUE ANSWER : ?
YOUR ANSWER : ?

High ethanol concentration

promotes yeast growth

inhibits bacterial growth

promotes bacterial growth

inhibits yeast growth

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used for aeration in a fermentor?

Impeller

Sparger

Baffles

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Candida utilis is used for the fermentation of waste sulphate liquor since it ferments

none of these

pentoses only

hexoses only

both hexoses and pentoses

TRUE ANSWER : ?
YOUR ANSWER : ?

Ethanol is produced by

continuous fermentation

none of these

batch fermentation

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

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