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Which feature is
common to the electron transport chains of both photosynthesis and cellular respiration?
A. Oxygen
the terminal electron acceptor.
B.
Electrons flow in a cyclic pattern, with no terminal electron receptor.
C. Coupled reactions establish an electrochemical gradient across a membrane.
D. NADP+ is the terminal electron acceptor.

Respuesta :

Iqta

Answer:

C. Coupled reactions establish an electrochemical gradient across a membrane.

Explanation:

  • During cellular respiration in mitochondria, and during photosynthesis in chloroplasts, the electron transport chain requires a proton gradient to pump protons across the membrane by active transport.
  • Protons flow back across the membrane by facilitated diffusion through ATP synthase, which utilizes them to phosphorylate ADP to ATP.
  • This process of ATP synthesis by harnessing the elctrochemicaal gradient geenrated by the diffusion of protons across the biological membrane through ATP synthase is called chemiosmosis.

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