Photosynthesis in Higher Plants MCQ. We covered all the Photosynthesis in Higher Plants MCQ in this post for free so that you can practice well for the exam.
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MCQ on Photosynthesis in Higher Plants for Students
To form 3 molecules of glucose, fixation of ……… molecules of CO2 and ………… turns of the Calvin cycle will be required.
(A) 18;6
(B) 6;6
(C) 12;3
(D) 18;18
Option d – 18;18
How many turns of the Calvin cycle will be required to form 5 molecules of glucose?
(A) 12 turns of Calvin’s cycle
(B) 52 turns of Calvin’s cycle
(C) 6 turns of Calvin’s cycle
(D) 30 turns of Calvin’s cycle
Option d – 30 turns of Calvin’s cycle
Which of the following reaction of the Calvin cycle is catalyzed by Ribulose bisphosphate carboxylase enzyme?
(A) 3-Phosphoglycerate to Triose phosphate
(B) Ribulose-1,5- bisphosphate to 3- phosphoglycerate
(C) Phosphoenol pyruvate to OAA
(D) Oxalo Acetic Acid to malic acid
Option b – Ribulose-1,5- bisphosphate to 3- phosphoglycerate
In which of the following plants, photorespiration does NOT occur?
(A) Hibiscus
(B) Maize
(C) Banyan
(D) Solanum tuberosum
Option b – Maize
During the reduction stage of the Calvin cycle, NADPH+H is used for the reduction of
(A) RuBP
(B) Triose Phosphate
(C) 3-PGA
(D) Starch
Option c – 3-PGA
What is an Absorption spectrum graph?
(A) It is a graph of a wavelength absorbed by the chief pigment.
(B) It is a graph of wavelength reflected by photosynthetic pigments.
(C) It is a graph of a wavelength absorbed by chlorophyll a,b, and carotenoids.
(D) It is a graph of wavelength reflected by accessory pigments.
Option c – It is a graph of a wavelength absorbed by chlorophyll a,b, and carotenoids.
Light reaction of photosynthesis does NOT yield
(A) ATP
(B) Oxygen
(C) NADPH₂
(D) RuBP
Option d – RuBP
Select the CORRECT statement/s with respect to Calvin’s cycle. i. PEP carboxylase is the major enzyme of the Calvin cycle. It is depended on the products of light reactions. iii. It occurs in the stroma of the chloroplast. iv. This involves reactions that are directly light-driven.
(A) i and iv
(B) ii and iii
(C) iii and iv
(D) i,ii and iv
Option b – ii and iii
Select the INCORRECT statement with respect to Maize and Sorghum plants.
(A) These plants show the presence of bundle sheath cells.
(B) These plants follow Hatch and Slack pathway for CO₂ fixation.
(C) Calvin cycle is absent in these plants.
(D) These plants show Kranz’s anatomy.
Option c – Calvin cycle is absent in these plants.
All the given statements are true regarding bundle sheath cells, except
(A) which are large-sized cells present around the vascular bundle in C4 plants.
(B) these cells are rich in enzyme PEPcase.
(C) The C3 cycle occurs in bundle sheath cells of C4 plants.
(D) these cells have a large number of chloroplast.
Option b – these cells are rich in enzyme PEPcase.
Read the given statements with respect to photorespiration in C3 plants. i. RuBP binds with O₂ to form one molecule of phosphoglycerate and phosphoglycolate. ii. The formation of 2 ATP molecules occurs instead of 3 ATP molecules. iii. Photorespiration in C3 plants results in the release of CO2. iv. Photorespiration in C3 plants results in the formation of one glucose molecule. The INCORRECT statement/s is/are
(A) ii and iv
(B) i, ii and iv
(C) iii and iv
(D) i and iii
Option a – ii and iv
Which of the following is NOT true with respect to C4 plants?
(A) The first stable product is 5 carbon compound.
(B) These plants are well adapted to dry tropical regions.
(C) These plants show Kranz’s anatomy of leaves.
(D) These plants show the presence of bundle sheath cells.
Option a – The first stable product is 5 carbon compound.
Photorespiration is known as a wasteful process because
(A) the synthesis of ATP and NADPH does not occur.
(B) synthesis of sugar does not occur.
(C) it works to undo the act of photosynthesis.
(D) all of these.
Option d – all of these
In green plants, O₂ is released during the process of photosynthesis. Which of the following is the source of this O₂?
(A) Water
(B) NADPH
(C) Carbohydrates
(D) Atmospheric CO2
Option a – Water
Which of the following is FALSE and about Hatch Slack pathway?
(A) Primary CO₂ acceptor is PEP
(B) The C3 cycle occurs in mesophyll cells
(C) CO₂ fixation occurs twice
(D) C4 acid formed in the mesophyll cell is transported to the bundle sheath cell.
Option b – The C3 cycle occurs in mesophyll cells
Which of the following does NOT occur during the carboxylation stage of the Calvin cycle?
(A) CO₂ is utilized for the carboxylation of RuBP
(B) Carboxylation reaction is catalyzed by the enzyme RuBP carboxylase
(C) Carboxylation results in the formation of two molecules of 3-PGA
(D) Carboxylation of 3-PGA by using ATP and its reduction by using NADPH2
Option d – Carboxylation of 3-PGA by using ATP and its reduction by using NADPH2
Which of the following occurs during the dark reaction of photosynthesis?
(A) Glucose is oxidized to release CO₂
(B) Splitting of water occurs to release O₂
(C) ATP and NADPH+H formed
(D) Fixation of atmospheric CO₂ occurs to form carbohydrates
Option d – Fixation of atmospheric CO₂ occurs to form carbohydrates
In cyclic photophosphorylation, the excited electron is cycled back to PS I complex through the electron transport chain when
(A) photolysis of water occurs
(B) Oxygen is released
(C) NADP is not available
(D) NADPH, is formed
Option c – NADP is not available
Chlorophyll a is known as an essential pigment because ( Photosynthesis in Higher Plants MCQ )
(A) Chlorophyll a is the only pigment capable of absorption and conversion of solar energy into chemical energy.
(B) Chlorophyll forms the reaction center in the photosystem.
(C) It plays an important role in both cyclic and non-cyclic photophosphorylation.
(D) all of these.
Option d – all of these
Select the CORRECT statement from the following with respect to Photophosphorylation. process in which ATP is utilized
(A) It is a process in which ATP is utilized and forms ADP.
(B) It is a process in which photolysis of water occurs to release O₂.
(C) It is a process in which chemical energy is converted into organic compounds.
(D) It is a process in which ATP is formed in presence of light and chlorophyll during the photochemical phase of photosynthesis.
Option d – It is a process in which ATP is formed in presence of light and chlorophyll during the photochemical phase of photosynthesis.
Read the given statements. Statement I: Chemiosmotic theory of ATP synthesis in chloroplast and mitochondria is based on proton gradient. Statement II: NADP reductase is the enzyme that makes ATP by chemiosmosis. The INCORRECT statement/s is/are
(A) Statement I
(B) Statement II
(C) Both statements I and II
(D) Neither statement I nor II
Option b – Statement II
According to the Chemiosmotic hypothesis, the primary electron acceptor
(A) is located on the outer side of the thylakoid membrane.
(B) passes its electron to an electron carrier.
(C) is located on the inner side of the thylakoid membrane.
(D) is located in the lumen of the thylakoid.
Option a – is located on the outer side of the thylakoid membrane.
Which of the following is TRUE regarding the dark reaction of photosynthesis?
(A) It is a photochemical process.
(B) It involves photophosphorylation.
(C) Products of light reactions are necessary to carry out dark reactions.
(D) ATP, NADPH2, O₂, and H₂O are the end products of dark reactions.
Option c – Products of light reactions are necessary to carry out dark reactions.
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