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question 7 of 48
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question 7
protons pumped across the thylakoid membrane during the light reaction pass through a synthase enzyme to produce what molecule during photphosphorylation?
o a. atp
b. a five carbon sugar, a nitrogenous acid, and a phosphate group
o c. adp
d. nadp+
o e. nadph

Explanation:

During photophosphorylation in the light - reaction of photosynthesis, protons (H⁺) are pumped across the thylakoid membrane. These protons then flow back through ATP synthase (a synthase enzyme). The energy from the proton gradient is used to convert ADP (adenosine diphosphate) and inorganic phosphate (Pi) into ATP (adenosine triphosphate).

• Option b describes the components of a nucleotide, not the product of photophosphorylation through the synthase enzyme.
• ADP is the reactant in the formation of ATP in this process, not the product.
• NADP⁺ is reduced to NADPH in the light - reactions, but this is not directly related to the proton flow through the synthase enzyme.

Answer:

A. ATP