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Photosynthesis in Higher Plants · Question 72

AIPMT 2002MCQEasy📈 Topic in 88% papers+4−1
1

In photosynthesis energy from light reaction to dark reaction is transferred in the form of

  1. ADP
  2. ATP
  3. RuDP
  4. chlorophyll

Answer

(2) ATP

Solution

As per NCERT, the products of the light reaction are ATP, NADPH and O2.

⇒ O2 diffuses out of the chloroplast, while ATP and NADPH are used to drive the biosynthetic (dark) phase, i.e., the Calvin cycle.

∴ Energy is carried from the light reaction to the dark reaction as ATP (the energy currency), with NADPH as the reducing power.

Answer: (2)

AIPMT 2002

Keep practising — Photosynthesis in Higher Plants

2

Which pigment system is inactivated in red drop?

  1. PS-I and PS-II
  2. PS-I
  3. PS-II
  4. None of the above
AIPMT 2001
3

Which pair is wrong?

  1. C3-maize
  2. C4-Kranz anatomy
  3. Calvin cycle-PGA
  4. Hatch and Slack cycle-OAA
AIPMT 2001
4

Which is the first CO2 acceptor enzyme in C4 plants?

  1. RuDP carboxylase
  2. Phosphoric acid
  3. RuBisCO
  4. PEP- carboxylase
AIPMT 2000
5

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
6

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
7

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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