Home >> Topics >> Photosynthesis in Higher Plants
Questions Not AttemptedQuestions Attempted
Unattempted Questions
Questions Available: 24
Year: 2023
Topic: Photosynthesis in Higher Plants
1.
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statemnents, choose the correct answer from the options given below:
(1).
Both A and R are true but R is NOT the correct explanntion of A
(2).
A is true but R is false.
(3).
A is false but R is true.
(4).
Both A and R are true and R is the correct explanation of A.

Test
Solution
Year: 2022
Topic: Photosynthesis in Higher Plants
2.
What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?
(1).
To provide the site of photorespiratory pathway
(2).
To increase the number of chloroplast for the operation of Calvin cycle
(3).
To enable the plant to tolerate high temperature
(4).
To protect the vascular tissue from high light intensity

Test
Solution
Year: 2025
Topic: Photosynthesis in Higher Plants
3.
Match List I with List II:

Choose the option with all correct matches
(1).
A-I, B-IV, C-III, D-II
(2).
A-III, B-IV, C-II, D-I
(3).
A-III, B-I, C-II, D-IV
(4).
A-I, B-lI, C-IV, D-III

Test
Solution
Year: 2025
Topic: Photosynthesis in Higher Plants
4.
Which of the following statements about RuBisCO is true?
(1).
It catalyzes the carboxylation of RuBP.
(2).
It is active only in the dark.
(3).
It has higher affinity for oxygen than carbon digxide.
(4).
It is an enzyme involved in the photolysis of water.

Test
Solution
Year: 2024
Topic: Photosynthesis in Higher Plants
5.
Which of the following are required for the dark reaction of photosynthesis?
A. Light
B. Chlorophyll
C. CO2
D. ATP
E. NADPH
Choose the correct answer from the options given below:
(1).
C, D and E only
(2).
D and E only
(3).
A, B and C only
(4).
B, C and D only

Test
Solution
Year: 2024
Topic: Photosynthesis in Higher Plants
6.
How many molecules of ATP and NADPH are required for every molecule of CO2 fixed in the Calvin cycle?
(1).
3 molecules of ATP and 3 molecules of NADPH
(2).
3 molecules of ATP and 2 molecules of NADPH
(3).
2 molecules of ATP and 3 molecules of NADPH
(4).
2 molecules of ATP and 2 molecules of NADPH

Test
Solution
Year: 2024
Topic: Photosynthesis in Higher Plants
7.
Given below are two statements:
Statement I: In C3 plants, some O2 binds to RuBisCO, hence CO2 fixation is decreased.
Statement II: In C4 plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration
. In the light of the above statements, choose the correct answer from the options given below:
(1).
Statement I is true but Statement II is false
(2).
Statement I is false but Statement II is true
(3).
Both Statement I and Statement II are true
(4).
Both Statement I and Statement II are false

Test
Solution
Year: 2023
Topic: Photosynthesis in Higher Plants
8.
How many ATP and NADPH2 are required for the synthesis of one molecule of Glucose during Calvin cycle ?
(1).
18 ATP and 12 NADPH2
(2).
12 ATP and 16 NADPH2
(3).
18 ATP and l6 NADPH2
(4).
12 ATP and 12 NADPH2

Test
Solution
Year: 2023
Topic: Photosynthesis in Higher Plants
9.
Which micronutrient is required for splitting of water molecule during photosynthesis?
(1).
molybdenum
(2).
magnesium
(3).
copper
(4).
manganese

Test
Solution
Year: 2023
Topic: Photosynthesis in Higher Plants
10.
The reaction centre in PS II has an absorption maxima at
(1).
700 nm
(2).
660 nm
(3).
780 nm
(4).
680 nm

Test
Solution
Year: 2022
Topic: Photosynthesis in Higher Plants
11.
Given below are two statements:
Statement I : The primary CO2 acceptor in C4 plants is phosphoenolpyruvate and is found in the mesophyll cells.
Statement II : Mesophyll cells of C, plants lack RuBisCo enzyme.
In the light of the above statements, choose the correct answer from the options given below:
(1).
Both Statenment I and Statement II are correct
(2).
Both Statenent I and Statement II are incorrect
(3).
Statement I is correct but Statement II is incorrect
(4).
Statement I is incorrect but Statement II is correct

Test
Solution
Year: 2022
Topic: Photosynthesis in Higher Plants
12.
Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis?
It involves:
(1).
Breakdown of proton gradient
(2).
Breakdown of electron gradient
(3).
Movement of protons across the membrane to the stroma
(4).
Reduction of NADP to NADPH, on the stroma side of the membrane

Test
Solution
Year: 2021
Topic: Photosynthesis in Higher Plants
13.
The first stable product of C02 fixation in sorghum is:
(1).
Pyruvic acid
(2).
Oxaloacetic acid
(3).
Succinic acid
(4).
Phosphoglyceric acid

Test
Solution
Year: 2021
Topic: Photosynthesis in Higher Plants
14.
Which of the following statements is incorrect?
(1).
Both ATP and NADPH + H+ are synthesized during non-cyclic photophosphorylation.
(2).
Stroma lamellae have PS I only and lack NADP reductase.
(3).
Grana lamellae have both PS I and PS II.
(4).
Cyclic photophosphorylation involves both PS I and PS II.

Test
Solution
Year: 2020
Topic: Photosynthesis in Higher Plants
15.
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
(1).
1 molecule of 3-C compound
(2).
1 molecule of 6-C compound
(3).
1 molecule of 4-C compound and 1 molecule of 2-C compound
(4).
2 molecules of 3-C compound

Test
Solution
Year: 2020
Topic: Photosynthesis in Higher Plants
16.
In light reaction, plastoquinone facilitates the transfer of electrons from:
(1).
Cytb6f complex to PS-I
(2).
PS-I to NADP+
(3).
PS-I to ATP synthase
(4).
PS-Il to Cytb16f complex

Test
Solution
Year: 2018
Topic: Photosynthesis in Higher Plants
17.
Which of the following is not a product of light reaction of photosynthesis ?
(1).
Oxygen
(2).
NADPH
(3).
NADH
(4).
ATP

Test
Solution
Year: 2018
Topic: Photosynthesis in Higher Plants
18.
Oxygen is not produced during photosynthesis by
(1).
Chara.
(2).
Cycas.
(3).
Nostoc.
(4).
Green sulphur bacteria.

Test
Solution
Year: 2018
Topic: Photosynthesis in Higher Plants
19.
Which of the following organisms are known as chief producers in the oceans ?
(1).
Euglenoids
(2).
Cyanobacteria
(3).
Diatoms
(4).
Dinoflagellates

Test
Solution
Year: 2017
Topic: Photosynthesis in Higher Plants
20.
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ?
(1).
Tomato is a greenhouse crop which can be grown in CO2 -enriched atmosphere for higher yield.
(2).
Light saturation for CO2 fixation occurs at 10% of full sunlight.
(3).
Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2fixation rate.
(4).
C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum.

Test
Solution
Year: 2017
Topic: Photosynthesis in Higher Plants
21.
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in
(1).
C3 and C4 plants
(2).
C3 plants
(3).
C4 plants
(4).
C2 plants

Test
Solution
Year: 2016
Topic: Photosynthesis in Higher Plants
22.
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant ?
(1).
C4
(2).
CAM
(3).
Nitrogen-fixer
(4).
C3

Test
Solution
Year: 2016
Topic: Photosynthesis in Higher Plants
23.
Emerson's enhancement effect and red drop have been instrumental in the discovery of
(1).
two photosystems operating simultaneously
(2).
photophosphorylation and cyclic electron transport
(3).
oxidative phosphorylation
(4).
photophosphorylation and non-cyclic electron transport

Test
Solution
Year: 2016
Topic: Photosynthesis in Higher Plants
24.
In a chloroplast the highest number of protons are found in
(1).
lumen of thylakoids
(2).
intermembrane space
(3).
antennae complex
(4).
stroma

Test
Solution