ETHANOL PRODUCTION QUIZ

High ethanol concentration

promotes bacterial growth

promotes yeast growth

inhibits yeast growth

inhibits bacterial growth

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following microorganisms help in the ethanol production?

Saccharomyces uvarum

Saccharomyces cerevisiae

All of these

Zygomonas mobilis

TRUE ANSWER : ?
YOUR ANSWER : ?

What are different substrates used for ethanol production?

Juices from sugarcane or molasses or sugar beet

Starch containing substrate

All of these

Waste product from wood or processed wood

TRUE ANSWER : ?
YOUR ANSWER : ?

Yeast is used in the production of

curd

ethyl alcohol

cheese

acetic acid

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Bacillus

E. coli

Pseudomonas

Yeast

TRUE ANSWER : ?
YOUR ANSWER : ?

What are the fermentation conditions for the ethanol production?

pH 6; temperature 30°C

pH 5; temperature 35°C

pH 6; temperature 35°C

pH 5; temperature 30°C

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

for next fermentation

as single cell protein for animal feed

as manure

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Sparger

All of these

Baffles

Impeller

TRUE ANSWER : ?
YOUR ANSWER : ?

If starch containing substrates are used for ethanol production, yeast strain can't be used directly because

starch is not a suitable substrate for the production of ethanol

it doesn't contain amylases to hydrolyze starch

None of these

it is converted to pentose sugar

TRUE ANSWER : ?
YOUR ANSWER : ?

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

All of these

Baffles

Sparger

Impeller

TRUE ANSWER : ?
YOUR ANSWER : ?

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