1D: Bioenergetics & Metabolism · Flashcards

Question

Why can complete oxidation of one glucose yield either about $30$ or about $32$ ATP?

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Answer

The shuttle used for cytosolic $N A D H$ changes ATP yield.

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Question

What is the standard versus cellular $D e l t a G$ for ATP hydrolysis?

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Answer

About $- 30.5$ kJ/mol standard; about $- 50$ kJ/mol in cells.

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Question

Why does $F A D H_{2}$ yield less ATP than $N A D H$ ?

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Answer

It enters at Complex II, bypassing Complex I proton pumping.

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Question

What are the approximate ATP yields of NADH and FADH $_{2}$ in the ETC?

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Answer

NADH: about $2.5$ ATP; FADH $_{2}$ : about $1.5$ ATP.

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