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Standard VIII
Biology
Question

What are the important products of yeast fermentation?
  1. Ethanol and acetic acid
  2. All of the above
  3. Butanol, glycerol and pyruvic acid
  4. Phenyl ethanol, amyl alcohol and caproic acid

A
Ethanol and acetic acid
B
Butanol, glycerol and pyruvic acid
C
All of the above
D
Phenyl ethanol, amyl alcohol and caproic acid
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Solution
Verified by Toppr

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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Q1

Yeast is used in the production of :

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

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Q2
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.
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Q3
Assertion: Fermentation occurs by the incomplete oxidation of glucose.
Reason: Yeast forms ethanol & CO2 from pyruvic acid.
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Q4

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.


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Q5
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