Photosynthesis in Higher Plants

Question

Identify the membrane across which the proton (H+) gradient facilitates ATP synthesis in a typical eukaryotic cell

  • plasma membrane

  • mitochondrial inner membrane

  • mitochondrial outer membrane

  • nuclear membrane

Answer

B.

mitochondrial inner membrane

According to chemiosmotic hypothesis, put forward by Mitchell, the electron transfer chain present on the inner mitochondrial membrane generates an electrochemical proton concentration gradient across the membrane. This gradient works as the driving force for ATP synthesis.

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