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Much of the energy released in catabolic reactions is captured in ATP for use in other reactions. When the phosphate is transferred directly from an organic molecule to ADP in order to produce ATP without an energized membrane, what has occurred?

A.substrate-level phosphorylation
B.oxidative phosphorylation
C.noncyclic photophosphorylation
D.cyclic photophosphorylation

Answer :

bogadu

Answer:      

A.substrate-level phosphorylation

Explanation:

Substrate-level phosphorylation occurs when phosphate is transferred directly from an organic molecule to ADP in order to produce ATP without an energized membrane as is done in oxidative phosphorylation. It is the phosphorylation of ADP from organic phosphate source (Pi). Substrate-level phosphorylation occurs in two steps of the second-half of glycolysis to produce ATP.

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