Given below are two statements,one is labeled assertion(A) and the other is labeled reason(R)
Assertion : Alcoholic fermentation by yeast stops when alcohol in the sugar solution reaches to about 13%.
Reason : Saccharomyces cerevisiae poisons themselves to death when the concentration of alcohol reaches about 13%.
In light of the above statements, choose the correct answer.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are true but (R) is not the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.

answer is A.

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Detailed Solution

The assertion is correct. It states that alcoholic fermentation by yeast often stops when the concentration of alcohol in the sugar solution reaches around 13%. This phenomenon is well-documented and observed in brewing and wine-making processes, among others. At higher alcohol concentrations, yeast cells may struggle to function optimally, leading to fermentation slowing down or ceasing altogether.

Reason is also correct. High concentrations of alcohol can have toxic effects on yeast metabolism.

Both (A) and (R) are true and (R) is the correct explanation of (A).

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