The carrier molecules in the electron transport chain that have a tightly bound metal atom responsible for accepting and donating electrons are ________.

Question

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Cytochromes have a tightly bound metal atom (such as iron) that accepts and donates electrons during oxidative phosphorylation. NAD⁺, FAD, and NADH are electron carriers but do not have a metal atom in their structure. Flavoproteins do have a metal atom (usually iron or copper) but are not always tightly bound and are not always involved in electron transport.

The Carrier Molecules in the Electron Transport Chain That Have