Some yeast, sugar and water are mixed in a test-tube. The diagrams show the testtube at the start and after one hour.Q. Which process causes this change?a)Growthb)Irritabilityc)Reproductiond)RespirationCorrect answer is option 'D'. Can you explain this answer?

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Some yeast, sugar and water are mixed in a test-tube. The diagrams show the testtube at the start and after one hour.

Q. Which process causes this change?

a)
Growth
b)
Irritability
c)
Reproduction
d)
Respiration

Correct answer is option 'D'. Can you explain this answer?

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Verified Answer

Some yeast, sugar and water are mixed in a test-tube. The diagrams sho...

The process that causes this change is respiration.

When yeast, sugar, and water are mixed, yeast cells undergo respiration to break down the sugar and produce energy. This process releases carbon dioxide (CO₂) as a byproduct, which can cause bubbling or the formation of gas in the test tube. This is a form of anaerobic respiration, where sugar is broken down in the absence of oxygen to release energy.

Growth (Option A) is not the primary cause here, as growth involves an increase in size or number of cells, not the release of gas.
Irritability (Option B) refers to the ability to respond to stimuli, which is not relevant here.
Reproduction (Option C) would involve the formation of new organisms or cells, which is not the case in this scenario.

Thus, the correct answer is Option D: Respiration.

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Most Upvoted Answer

Some yeast, sugar and water are mixed in a test-tube. The diagrams sho...

Answer is B

Answered by Praveen Kumar · View profile

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