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49) What most directly is responsible for creation of ATP in mitochondria?         A. NADH   ...

49) What most directly is responsible for creation of ATP in mitochondria?
        A. NADH    B. H+ diffusion gradient    C. Acetyl CoA        D. Cytochrome C

50) From which of the following steps of respiration does the majority of the energy come?
A. Glycolysis    B. Pyruvate processing    C. Citric acid cycle    D. Electron transport chain

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Answer #1

49) What most directly is responsible for creation of ATP in mitochondria?

Answer: A. NADH.

Explanation: In mitochondria, NADH produced from Kreb cycle (mitochondrial matrix), is utilized by the enzymes present in the membrane (inner lining of the mitochondria) to produce Adenosine Triphosphate i.e. ATP.

50) From which of the following steps of respiration does the majority of the energy come?

Answer: C. Citric acid cycle

Explanation: ATP obtained in: Glycolysis- 4ATP; Pyruvate processing- 5ATP and Citric acid cycle- 15+ATP.

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