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The ATP synthase of the chloroplast has two parts. The part embedded in the thylakoid membrane is

  • (a) CF1 Your answer
  • (b) CF0 Correct
  • (c) the headpiece Your answer
  • (d) F1 Your answer
Your answer: Correct answer: (b)
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Explanation

Why (b) is correct

The chloroplast ATP synthase has two parts: CF0, embedded in the thylakoid membrane (the proton channel), and CF1, which projects into the stroma.

Why the other options are wrong

  • (a) · your answer CF1 sticks out into the stroma; it is not embedded.
  • (c) · your answer "Headpiece" refers to the part that sticks out, like CF1.
  • (d) · your answer F1 is the headpiece of mitochondrial ATP synthase (the counterpart of CF1); the part embedded in the thylakoid membrane is CF0.
NCERT point: Protons flow through CF0; ATP is made at CF1.
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