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Photosynthesis in Higher Plants

AIPMT 2001MCQEasy📈 Topic in 12% papers+4−1
Ques. 1AIPMT 2001

Which pair is wrong?

  1. C3-maize
  2. C4-Kranz anatomy
  3. Calvin cycle-PGA
  4. Hatch and Slack cycle-OAA

Answer

(1) C3-maize

Solution

As per NCERT, maize, sugarcane and sorghum are C4 plants; their leaves show Kranz anatomy (bundle sheath cells around the vascular bundles).

⇒ The first stable product of the Calvin cycle is 3-phosphoglyceric acid (PGA), and that of the Hatch and Slack pathway is oxaloacetic acid (OAA).

∴ The pair 'C3-maize' is wrong.

Answer: (1)

Keep practising — Photosynthesis in Higher Plants

Ques. 2AIPMT 2000

Which is the first CO2 acceptor enzyme in C4 plants?

  1. RuDP carboxylase
  2. Phosphoric acid
  3. RuBisCO
  4. PEP- carboxylase
Ques. 3AIPMT 2000

For assimilation of one CO2 molecule, the energy required in form of ATP and NADPH2 are

  1. 2 ATP and 2 NADPH2
  2. 5 ATP and 3 NADPH2
  3. 3 ATP and 2 NADPH2
  4. 18 ATP and 12 NADPH2
Ques. 4AIPMT 2000

For the synthesis of one glucose molecule the Calvin cycle operates for

  1. 2 times
  2. 4 times
  3. 6 times
  4. 8 times
Ques. 5AIPMT 2000

The first step for initiation of photosynthesis will be

  1. photolysis of water
  2. excitation of chlorophyll molecules due to absorption of light
  3. ATP formation
  4. glucose formation

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