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Photosynthesis in Higher Plants · Question 74

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

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)

AIPMT 2001

Keep practising — Photosynthesis in Higher Plants

2

Which is the first CO2 acceptor enzyme in C4 plants?

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

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
AIPMT 2000
4

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

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

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
AIPMT 2000

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