Which phrase best describes the electron transport chain in photosynthesis? a. A chain of photosynthetic proteins located in the stroma b. A collection of enzymes used to make ADP c. A series of proteins located in the thylakoid membrane d. A group of enzymes that carries energy to the Calvin cycle

The correct answer is c.

Explanation:

Photosynthesis occurs in two stages: the light-dependent reactions and the carbon-fixing reactions. In light-dependent reactions, absorption of light energy by chlorophyll a molecules in the thylakoid membrane initiates electron transport and the formation of a proton gradient from which ATP is produced, that is, Light conducts the flow of electrons  in the thylakoid membrane  and the flow of electrons in the thylakoid membrane driven by light generates a proton gradient that activates ATP synthase. During this process, the water molecule is split off and oxygen gas molecules are released. The electrons are finally absorbed by NADP + and NADPH is formed.

cell regulation is conducted by special proteins.

currents is the correct answer.