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In which of the following plants is 3-PGA the first stable product of CO2 fixation?

  • (a) maize Your answer
  • (b) sugarcane Your answer
  • (c) sorghum Your answer
  • (d) wheat Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

Wheat is a C3 plant, so its first stable product is 3-PGA. Maize, sugarcane and sorghum are C4 plants.

Why the other options are wrong

  • (a) · your answer Maize is C4; its first product is OAA.
  • (b) · your answer Sugarcane is C4.
  • (c) · your answer Sorghum is C4.
NCERT point: C3: PGA first; C4: OAA first.
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