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Multiple Choice Questions

3-phosphoglyceric acid (PGA) as the first CO2 fixation product in algal photosynthesis was discovered by 

  • Joseph Priestley

  • Jan Ingenhousz

  • T.W. Engelmann

  • Julius von Sachs

  • Julius von Sachs


Kranz anatomy is not seen in

(i) Maize

(ii) Sorghum

(iii) Tomato

  • (i) and (ii) only

  • (i) and (iii) only

  • (i) only

  • (ii) only

  • (ii) only


Maximum absorption of light by chlorophyll a occurs in which regions of the absorption spectrum?

(A) blue             

(B) red

(C) green

(D) yellow

  • (A) and (B) only

  • (B) and (C) only

  • (A) and (D) only

  • (B) and (D) only

  • (B) and (D) only


Cyclic-photophosphorylation results in the formation of

  • NADPH + H+

  • ATP and NADPH + H+

  • ADP

  • ATP

  • ATP


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Splitting of water molecues during the light reaction of photosynthesis is associated  with

(a) PSI resulting in the release of O2, Protons and transfer of electrons of PS II.

(b) PSII resulting in the release of O2, Protons and transfer of electrons of PS I.

(c) PSII resulting in the release of O2, Protons and transfer of electrons of PS II.

(d) PSI resulting in the release of O2, Protons and transfer of electrons of PS I.

  • (a) alone is correct

  • (b) alone is correct

  • (c) alone is correct

  • (d) alone is correct

  • (d) alone is correct


In photorespiration, the number of ATP and NADPH synthesised are respectively

  • 1 and 3

  • 2 and 3

  • 3 and 4

  • 0 and 0

  • 0 and 0


Match the following

Column I Column II
A. Chlorophyll a 1. yellow
B. Chlorophyll b 2. bright or blue green
C. Xanthophyll 3. yellow - yellow orange
D. Carotenoids 4. yellow green

  • A - 2; B - 4; C - 1; D - 3

  • A - 3; B - 4; C - 2; D - 1

  • A - 4; B - 3; C - 2; D - 1

  • A - 4; B - 2; C - 1; D - 3

  • A - 4; B - 2; C - 1; D - 3


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