NEET Botany Photosynthesis in Higher Plants MCQs

    Prepare for NEET Biology Photosynthesis in Higher Plants with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert guidance to grasp light and dark reactions.

    NEET Questions / Botany / Photosynthesis in Higher Plants

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    Photorespiration And C4-Cycle
    Light Phase
    Dark Phase
    Factors Affect Photosynthesis
    Introduction
    1.

    The regeneration phase of the Calvin cycle requires ATP. What is the primary role of ATP in this phase?

    A

    Reduction of 3-PGA to G3P

    B

    Phosphorylation of intermediates to convert them back to RuBP

    C

    Fixation of CO2 to RuBP

    D

    Regeneration of NADPH

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Calvin Cycle, ATP, RuBP Regeneration
    2.

    Under conditions of high temperature and drought stress, a plant closes its stomata to conserve water. Which of the following is the MOST DIRECT consequence on the Calvin cycle?

    A

    Increased photorespiration due to oxygen accumulation.

    B

    Enhanced ATP synthesis due to increased proton gradient.

    C

    Reduced availability of CO2 limits carboxylation, leading to a decrease in RuBP regeneration.

    D

    Increased activity of Rubisco due to higher substrate concentration.

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Factors Affect Photosynthesis
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, Calvin Cycle, Stomata, CO2, Rubisco, RuBP
    3.

    In photorespiration, RuBP is converted to:

    A

    PGA and phosphoglycolate

    B

    Two molecules of PGA

    C

    Two molecules of phosphoglycolate

    D

    PGA and oxaloacetate

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Photorespiration And C4-Cycle
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :0.5 mins
    🔄Ncert Concepts :photorespiration, RuBisCO, RuBP
    4.

    Which of the following is NOT directly involved in the regeneration of RuBP during the dark phase of photosynthesis?

    A

    ATP

    B

    NADPH

    C

    ATP synthase

    D

    Several enzymes

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :0.5 mins
    🔄Ncert Concepts :Dark Phase, Calvin Cycle, RuBP Regeneration, Photosynthesis
    5.

    The first stable product of CO2CO_2 fixation in the Calvin cycle is:

    A

    RuBP

    B

    3-PGA

    C

    G3P

    D

    Glucose

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :0.5 mins
    🔄Ncert Concepts :dark reaction, Calvin cycle, 3-PGA, RuBP
    6.

    The primary CO2C{O_2} acceptor molecule in C3{C_3} cycle is a

    A

    3-carbon aldose sugar

    B

    5-carbon ketose sugar

    C

    3-carbon ketose sugar

    D

    5-carbon aldose sugar

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Photosynthesis, C3 cycle, Carbon fixation, Ribulose-1, 5-bisphosphate (RuBP)
    7.

    PEP carboxylase

    I. is involved in atleast some CO2C{O_2} fixation in both C3{C_3} and C4−{C_4} - plants

    II. Catalyses the reaction of fixing CO2C{O_2} into pyruvic acid in bundle sheath cells

    III. is capable of fixing CO2C{O_2} more efficiently at lower atmospheric CO2C{O_2} concentration than RuBP carboxylase

    Select the correct option

    A

    I only

    B

    I and III

    C

    II and III

    D

    I, II and III

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :PEP carboxylase, C3 plants, C4 plants, RuBP carboxylase, carbon fixation
    8.

    PEP carboxylase

    I. is involved in atleast some CO2C{O_2} fixation in both C3{C_3} and C4−{C_4} - plants

    II. Catalyses the reaction of fixing CO2C{O_2} into pyruvic acid in bundle sheath cells

    III. is capable of fixing CO2C{O_2} more efficiently at lower atmospheric CO2C{O_2} concentration than RuBP carboxylase

    Select the correct option

    A

    I and II

    B

    I and III

    C

    II and III

    D

    I, II and III

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :PEP carboxylase, C3 plants, C4 plants, CO2 fixation, RuBP carboxylase, bundle sheath cells, photosynthetic pathways
    9.

    Choose the correct statement.

    A

    The C4−{C_4} - plants do not have RUBISCO

    B

    Carboxylation of RuBP leads to the formation of PGA and phosphoglycolate

    C

    Carboxylation of phosphoenol pyruvate results in the formation of C4−{C_4} - plants

    D

    Decarboxylation of C4−{C_4} - acids occur in the mesophyll cells

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, C4 pathway, RUBISCO, RuBP, PEP, PGA, Phosphoglycolate, Mesophyll cells, Bundle Sheath cells
    10.

    Choose the correct statement.

    A

    The area of a circle is proportional to the square of its circumference.

    B

    The area of a circle is proportional to its circumference.

    C

    The circumference of a circle is proportional to the square root of its area.

    D

    The circumference of a circle is proportional to the square of its area.

    Question Tags

    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, C4 pathway, RuBisCO, PEP carboxylase, RuBP, PGA, Phosphoglycolate, Mesophyll cells, Bundle sheath cells

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