What are the important products of yeast fermentation?

Ethanol and acetic acid

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Butanol, glycerol and pyruvic acid

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Phenyl ethanol, amyl alcohol and caproic acid

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All of the above

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Solution

The correct option is A Ethanol and acetic acid
Ethanol forms an integral component of alcoholic beverages. It is produced by the fermentation of sugars by yeasts.
Acetic acid is a normal by-product of the alcoholic fermentation carried out by Saccharomyces cerevisiae.
So, the correct answer is option A.

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Similar questions

Yeast is used in the production of :

(a) Ethyl alcohol (b) Acetic acid
(c) Cheese (d) Curd

Q. Assertion :Acetic acid production involves both aerobic and anaerobic processes. Reason: Production of alcohol from glucose is an aerobic process and production of acetic acid from alcohol is an anaerobic process.

Q. Assertion: Fermentation occurs by the incomplete oxidation of glucose.
Reason: Yeast forms ethanol & CO2 from pyruvic acid.

The following is a simplified diagram showing the fate of glucose during aerobic and anaerobic respiration. Identify the end products that are formed at stages indicated A, B, C and D. Identify the correct option from those given below.

Q. Hydrocarbon

(A) (C = 87.2 %)

on hydrogenation forms

(B) (C = 84.1 %)

. Ozonolysis of

(A)

forms acetic acid, acetone and pyruvic acid

⎛ ⎜ ⎝ C H_{3} - O ∥ C - C O O H ⎞ ⎟ ⎠

. What are

(A)

and

(B)

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