NCERT Biology Photosynthesis higher plants class-11 mcqs,notes,pdfs

Photosynthesis Higher Plants Mock Exam-10

Question No:1

What will be the effect of intermittent light on photosynthesis?

[A] It will increase
[B] It will decrease
[C] Nothing will happen
[D] Process will stop



Question No:2

Main factor which limits the rate of photosynthesis on a clear day is

[A] chlorophyll
[B] light
[C] CO2
[D] water



Question No:3

Blackman’s law of limiting factor is applied to

[A] growth
[B] respiration
[C] transpiration
[D] photosynthesis



Question No:4

Which factor is not limited to normal conditions for photosynthesis?

[A] Air
[B] CO2
[C] Water
[D] Chlorophyll



Question No:5

The first product of CO2 fixation in Hatch and Slack (C4) cycle in plants is formation of

[A] oxaloacetate by carboxylation of phosphoenol pyruvate (PEP) in bundle sheath cells
[B] phosphoglyceric acid in mesophyll cells
[C] bundle sheath cells
[D] oxaloacetate by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells



Question No:6

Assertion: C4 pathway of CO2 fixation is found in some tropical plants.
Reason: In this pathway CO2 is fixed by 3C compound

[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:7

Assertion: Six molecules of CO2, and twelve molecules of NADPHT+ H+ and 18 ATP are used to form one hexose molecule.
Reason: Light reaction results in formation of ATP and NADPH2 and oxygen

[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:8

Assertion: The first CO2 fixation product was a C – organic compound.
Reason: Use of radioactive C14 in algal photosynthesis studied led to this discovery.

[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:9

Assertion: There is a decrease in photosynthesis, if the photosynthetic cells are illuminated by light of P680 nm or more wavelength.
Reason: In red drop phenomenon the rate of photosynthesis decreases.

[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:10

Assertion: CAM plants lack structural compartmentation of leaf, as found in C4 plants.
Reason: Stomata of CAM plants are open during the night.

[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:11

Assertion: Plants utilizing first RuBP in CO2 fixations are called C3 plants.
Reason: Plants utilizing first PEP in CO2 fixations are called C2 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:12

Assertion: Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason: Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.

[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:13

Assertion: The stromal thylakoids are rich in both PS I and PS II.
Reason: The granal membranes are rich in ATP synthetase.

[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:14

Assertion: Cyclic photo phosphorylation synthesizes NADPH.
Reason: NADPH synthesise in cyclic photo phosphorylation is not associated with ATP formation.

[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:15

Assertion: Oxidative phosphorylation requires oxygen.
Reason: Oxidative photo phosphorylation occurs in chloroplast.

[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