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Photosynthesis in Higher Plants · Question 69

AIPMT 2003MCQEasy📈 Topic in 12% papers+4−1
1

Which element is located at the centre of the porphyrin ring in chlorophyll?

  1. Calcium
  2. Magnesium
  3. Potassium
  4. Manganese

Answer

(2) Magnesium

Solution

Chlorophyll molecule = a porphyrin (tetrapyrrole) head + a phytol tail.

⇒ The four nitrogen atoms of the porphyrin ring hold a single metal atom at the centre, which is magnesium (Mg).

∴ Magnesium is located at the centre of the porphyrin ring of chlorophyll.

Answer: (2)

AIPMT 2003

Keep practising — Photosynthesis in Higher Plants

2

Which one of the following concerns photophosphorylation?

  1. ADP + AMP Light energy ATP
  2. ADP + Inorganic PO4 Light energy ATP
  3. ADP + Inorganic PO4 ATP
  4. AMP + Inorganic PO4 Light energy ATP
AIPMT 2003
3

Which of the following absorbs light energy for photosynthesis?

  1. Chlorophyll
  2. Water molecule
  3. O2
  4. RuBP
AIPMT 2002
4

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

  1. ADP
  2. ATP
  3. RuDP
  4. chlorophyll
AIPMT 2002
5

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
6

Which pair is wrong?

  1. C3-maize
  2. C4-Kranz anatomy
  3. Calvin cycle-PGA
  4. Hatch and Slack cycle-OAA
AIPMT 2001
7

Which is the first CO2 acceptor enzyme in C4 plants?

  1. RuDP carboxylase
  2. Phosphoric acid
  3. RuBisCO
  4. PEP- carboxylase
AIPMT 2000
8

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
9

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
10

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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