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  1. What would be the net gain of ATP from the breakdown of ten molecules of glucose under aerobic conditions?

10

20

40

360

  1. The Krebs cycle does NOT occur if

oxygen is present.

oxygen is not present.

glycolysis occurs.

carbon dioxide is present.

  1. In the Krebs cycle, the carbon atoms in a three-carbon molecule are released in

one molecule of water.

three molecules of oxygen.

three molecules of carbon dioxide.

one molecule of glucose.

Verified Answer :

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  1. "360" would be the net gain of ATP from the breakdown of ten molecules of glucose under aerobic conditions. The correct option among all the options given is the fourth option. 

    2.     The Krebs cycle does not occur if oxygen is not present. The correct option among all the options given in the question is the second option.

    3. In the Krebs cycle, the carbon atoms in a three-carbon molecule are released in three molecules of carbon dioxide. The correct option is the third option.

Answer:

1. Option D, 360

2. Option A, oxygen is present

3. Option C, three molecules of carbon dioxide.

Explanation:

1. Option D, 360

When one molecule of glucose break down in the process of photosynthesis , then thirty six molecules of ATP are produced. Thus, in break down of ten molecules of glucose , 360 molecules of ATP will be produced.

2. Option A, oxygen is present

In the Kerb cycle , if oxygen is present then the pyruvic acid (produced in the photosynthesis process) enters the mitochondria. As it enters the mitochondria, it will convert into acetyl coenzyme A (CoA) (which is a two carbon molecule) by loosing carbon dioxide molecule

3. 

Option C, three molecules of carbon dioxide.

In kerb cycle , for each pyruvate molecule , one carbon dioxide molecule is released.

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