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

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

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

185.

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

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

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