What is the importance of NADH and FADH2? Multiple choice question.

A)These molecules are recycled for use in glycolysis.

B)These molecules are used in the electron transport chain.

C)These molecules are useless by-products.

D)These molecules are used as products in photosynthesis.

B) These molecules are used in the electron transport chain.

Explanation:

NADH and FADH2 are used by donating electrons to the electron transport chain. They both donate electrons by providing an hydrogen molecule to the oxygen molecule to create water during the electron transport chain

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