NEET Biology Photosynthesis in Higher Plants MCQs Set 08

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Access targeted multiple-choice questions for Photosynthesis In Higher Plants designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Chapter-wise Objective Questions: Photosynthesis In Higher Plants

View or download the dedicated Photosynthesis In Higher Plants MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Biology evaluations.

Multiple Choice Questions

Question 1: Choose incorrect w.r.t. photosynthesis
(a) It is a physico-chemical process
(b) Oxygen is evolved as a by-product in all photosynthetic organisms
(c) Occurs in unicellular and multicellular photoautotrophs
(d) Anabolic and reductive process
Show Answer & Explanation

Answer: (b) Oxygen is evolved as a by-product in all photosynthetic organisms

Explanation:
1. In some bacteria, H2S is used instead of H2O. So O2 is not released.

Question 2: Moll’s half leaf experiment was done to show _____ was required for photosynthesis.
(a) H2O
(b) Chlorophyll
(c) Light
(d) CO2
Show Answer & Explanation

Answer: (d) CO2

Explanation:
1. In this experiment, half leaf was enclosed in a test tube containing KOH (which absorbs CO2), half leaf was in air.
2. When two halves were tested for starch, leaf in air showed the +ve test not other part, which shows CO2 is required for photosynthesis. (Historical account – Early experiments).

Question 3: A milestone contribution to the understanding of photosynthesis was made by Cornelius van Niel, which was based on the studies of
(a) Bacteria
(b) Alga
(c) Angiospermic plant
(d) Lower plant
Show Answer & Explanation

Answer: (a) Bacteria

Explanation:
1. Van Niel studied purple and green sulphur bacteria and showed, O2 evolved from H2O and not from CO2. 12H2O  6CO2  C6H12O6  6H2O  6O2.

Question 4: The essential role of air in the growth of green plants was revealed by
(a) Priestley
(b) Van Niel
(c) Blackmann
(d) Emerson
Show Answer & Explanation

Answer: (a) Priestley

Explanation:
1. Role of air in the growth of green plants is experimently proved by Priestley.

Question 5: Curve showing the effectiveness of different wavelength of light in photosynthesis was first given by Engelmann using all, except
(a) Filamentous green alga Cladophora
(b) Unicellular green alga Chlorella
(c) Suspension of aerobic bacteria
(d) Prism to split the light in its components
Show Answer & Explanation

Answer: (b) Unicellular green alga Chlorella

Explanation:
1. Hill used chlorella for proving that photosynthesis completed in two phase i.e., light and dark phase.

Question 6: Grana present in chloroplast refers to
(a) Stroma lamellae
(b) Stacks of quantasomes
(c) Stacks of thylakoids
(d) Double membranous envelope
Show Answer & Explanation

Answer: (c) Stacks of thylakoids

Explanation:
1. GRANA  Stacks of thylakoids (Photosynthetic units/Pigment systems).

Question 7: Photosystem is composed of
(a) Light harvesting complex
(b) Reaction centre
(c) Accessory pigments
(d) More than one is correct
Show Answer & Explanation

Answer: (d) More than one is correct

Explanation:
1. PS has LHC I or II, Reaction Centre, Accessory pigments.

Question 8: In the chloroplast, the stroma lamellae lack the
(a) PS I, NADP reductase
(b) PS II, PS I
(c) NADP reductase enzyme, P700
(d) NADP reductase, PS II
Show Answer & Explanation

Answer: (d) NADP reductase, PS II

Explanation:
1. PS II and NADP reductase absent in the stromo lamellae of the chloroplast.

Question 9: The movement of electrons as per Z-scheme in light reaction is
(a) From low to high energy level
(b) Uphill in redox potential scale
(c) Downhill in redox potential scale
(d) Both (2) & (3)
Show Answer & Explanation

Answer: (d) Both (2) & (3)

Explanation:
1. It can occur uphill / downhill in redox potential scale.

Question 10: The protons formed by splitting of water are released in the
(a) Lumen of the thylakoids
(b) Outer side of the membrane
(c) Both (1) & (2)
(d) Stroma of chloroplast
Show Answer & Explanation

Answer: (a) Lumen of the thylakoids

Explanation:
1. When a photon of light strikes the reaction centre of PS II, it emites an electron.
2. Two H2O molecules bind to an enzyme at reaction centre and enzyme splits the water and H+ are released in the lumen and also O2 is produced.

Question 11: Chemiosmotic hypothesis for generation of ATP during light reaction was first explained by
(a) Hill
(b) Arnold
(c) P. Mitchell
(d) Van Niel
Show Answer & Explanation

Answer: (c) P. Mitchell

Explanation:
1. Chemiosmotic theory for ATP synthesis was proposed by P.Mitchell.

Question 12: The photosystem connected with splitting of water is
(a) PS II
(b) PS I
(c) Carotenoid
(d) P700
Show Answer & Explanation

Answer: (a) PS II

Explanation:
1. Photolysis of H2O occurs at PS II.

Question 13: Read the following statements:<br />(a) F0 part of ATPase is associated with breakdown of proton gradient.<br />(b) A H-carrier contributes in creation of proton gradient.<br />(c) Movement of electrons in ETS is coupled to pumping of protons into the lumen.<br />(d) Formation of NADPH + H+ is related with the creation of proton gradient. How many of the above statements are correct?
(a) Two
(b) One
(c) Four
(d) Three
Show Answer & Explanation

Answer: (c) Four

Explanation:
1. + H + NADP Cyt PS b&f PS NADPH II I Lumen + + Thylakoid H H membrane F0 ATP synthesis Storma F1 ADP ATP.

Question 14: The CO2 acceptor in C3 plants is
(a) RuBP
(b) PGA
(c) PEP
(d) OAA
Show Answer & Explanation

Answer: (a) RuBP

Explanation:
1. In C3 plants, CO2 acceptor is Ribulose 1-5, bi-phosphate.

Question 15: Which among the following is not a step in Calvin cycle?
(a) Carboxylation
(b) Reduction
(c) Photophosphorylation
(d) Regeneration
Show Answer & Explanation

Answer: (c) Photophosphorylation

Explanation:
1. Photophosphorylation is the step of light reaction.

Question 16: The enzyme responsible for carboxylation reaction (CO2 fixation) in C3 plants is
(a) RuBP oxygenase
(b) Pyruvate decarboxylase
(c) RuBP carboxylase
(d) PEP carboxylase
Show Answer & Explanation

Answer: (c) RuBP carboxylase

Explanation:
1. In C3 plant carboxylation reaction is catalysed by enzyme RuBP carboxylase.

Question 17: Regeneration of four molecules of RuBP in C3 cycle requires the expenditure of _____ ATP.
(a) 1
(b) 4
(c) 3
(d) 2
Show Answer & Explanation

Answer: (b) 4

Explanation:
1. For 1 molecule of RUBP  1ATP For 4 molecule of RUBP  4ATP.

Question 18: Which of the following statements is not true regarding the C4 plants?
(a) They show kranz anatomy
(b) Decarboxylation process occurs in bundle sheath cells
(c) Granal chloroplast is present in bundle sheath cells.
(d) PEPcase enzyme activity occurs in mesophyll cells
Show Answer & Explanation

Answer: (c) Granal chloroplast is present in bundle sheath cells.

Explanation:
1. In Bundle sheath cells agranal chloroplast present.

Question 19: In C4 plants, first stable product of CO2 fixation is
(a) OAA
(b) RuBP
(c) 3-PGA
(d) Malic Acid
Show Answer & Explanation

Answer: (a) OAA

Explanation:
1. Oxalo acetic acid is first stable product in C4 plants.

Question 20: In C4 plants, sugar is produced in
(a) Bundle sheath cells
(b) Mesophyll cells
(c) Palisade leaf cells
(d) Spongy mesophyll
Show Answer & Explanation

Answer: (a) Bundle sheath cells

Explanation:
1. In C4 plants sugar synthesized in bundle sheath cell.

Question 21: The C4 and C3 plants differ from each other in
(a) Type of pigments involved in photosynthesis
(b) The primary acceptor of CO2 during carbon fixation
(c) Type of end products of photosynthesis
(d) Number of NADPH that are consumed during the starch synthesis process
Show Answer & Explanation

Answer: (b) The primary acceptor of CO2 during carbon fixation

Explanation:
1. In C3 plant primary CO2 accepter is RUBP white in C4 plant it is PEP.

Question 22: Which one of the following is a C4 plant?
(a) Papaya
(b) Potato
(c) Maize
(d) Pea
Show Answer & Explanation

Answer: (c) Maize

Explanation:
1. Maize is a C4 plant.

Question 23: ‘Kranz’ anatomy of leaves is found in
(a) C4 plants
(b) C3 plants
(c) CAM plants
(d) All plants
Show Answer & Explanation

Answer: (a) C4 plants

Explanation:
1. Kranz anatomy is shown by C4 plants.

Question 24: The enzyme required for the CO2 fixation in the C4 cycle is
(a) PEP carboxylase
(b) RuBP oxygenase
(c) RuBP carboxylase
(d) PGA dehydrogenase
Show Answer & Explanation

Answer: (a) PEP carboxylase

Explanation:
1. In mesophyll cell, PEP carboxylase required for CO2 fixation.

Question 25: Which of the following statement is correct regarding the C4 plants?
(a) The carbon fixation is catalysed by PEP carboxylase
(b) Mesophyll cells lack the RuBisCO enzyme
(c) Photorespiration is absent
(d) More than one option is correct
Show Answer & Explanation

Answer: (d) More than one option is correct

Explanation:
1. In C4 plants, RuBisCO enzyme absent in mesophyll cell, PEP carboxylase present in mesophyll cell.

Question 26: RuBisCO in C4 plants shows minimum oxygenase activity due to
(a) Abundance of RuBisCO
(b) Formation of C4 acid
(c) Decarboxylation of C4 acid
(d) Cyclic photophosphorylation
Show Answer & Explanation

Answer: (c) Decarboxylation of C4 acid

Explanation:
1. This is so because due to decarboxylation of C4 acid, CO2 evolved in Bundle sheath cell.

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Photosynthesis In Higher Plants Objective Questions & Solutions for NEET Biology

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