Question No:1

Assertion: Each molecule of ribulose-1, 5-bisphosphate fixes one molecule of CO₂
Reason: Three molecules of NADPH and two ATP are required for fixation of one molecule of CO₂.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:2

Assertion: Regeneration of CO₂ acceptor molecule RuBP is crucial if the cycle is to continue uninterrupted.
Reason: The regeneration steps require one ATP for phosphorylation to form RuBP.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:3

Assertion: C₄ photosynthetic pathway is more efficient than the C₃ pathway.
Reason: Photorespiration is suppressed in C₄ plants.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:4

Read the following four statements, (i), (ii), (iii) and (iv) and select the right option having both correct statements.
Statements:
(1) Z scheme of light reaction takes place in presence of PS I only
(2) Only PS I is functional in cyclic photo phosphorylation.
(3) Cyclic photo phosphorylation results into synthesis of ATP and NADPH₂
(4) Stromal lamellae lack PS II as well as NADP.

[A] (2)&(4)
[B] (1)&(2)
[C] (2)&(3)
[D] (3)&(4)



Question No:5

PGA as the first CO₂ fixation product was discovered in photosynthesis of:

[A] Bryophyte
[B] Gymnosperm
[C] Angiosperm
[D] Alga



Question No:6

C₄ plants are more efficient in photosynthesis than C₃ plants due to:

[A] Higher leaf area
[B] Presence of larger number of chloroplasts in the leaf cells
[C] Presence of thin cuticle
[D] Lower rate of photorespiration



Question No:7

CAM helps the plants in:

[A] Secondary growth
[B] Disease resistance
[C] Reproduction
[D] Conserving water



Question No:8

Which one of the following is essential for photolysis of water?

[A] Manganese
[B] Zinc
[C] Copper
[D] Boron



Question No:9

A process that makes important difference between C₃ and C₄ plants is:

[A] Transpiration
[B] Glycolysis
[C] Photosynthesis
[D] Photorespiration



Question No:10

The correct sequence of cell organelles during photorespiration is:

[A] Chloroplast, Golgi bodies, Mitochondria
[B] Chloroplast, Rough Endoplasmic Reticulum, Dictyosomes
[C] Chloroplast, Mitochondria, Peroxisome
[D] Chloroplast, Vacuole, Peroxisome.



Question No:11

In photosynthesis, the light-independent reactions take place at:

[A] Photo system I
[B] (c) Stromal matrix
[C] (b) Photo system II
[D] Thylakoid lumen