1.

    During photorespiration, the oxygenation activity of the RuBisCo enzyme results in the production of:

    A

    One molecule of phosphoglycerate and one molecule of phosphoglycolate

    B

    Two molecules of phosphoglycolate

    C

    Two molecules of phosphoglycerate

    D

    One molecule of phosphoglyceraldehyde and one molecule of phosphoglycolate

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    PYQ YEAR: 2020
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photorespiration, Photosynthesis, RuBisCo

    Related Questions

    1.

    Which plant performs photosynthesis even after the closing of stomata?

    A

    C2{C_2}

    B

    C3{C_3}

    C

    C4{C_4}

    D

    C5{C_5}

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, Stomata, C4 plants, Carbon fixation

    2.

    Which of the following characteristics out of A, B and C are exhibited by C4−{C_4} - plants? A. Kranz anatomy B.The product of photosynthesis is oxaloacetic acid C. Both PEP carboxylase and ribulose-bisphosphate carboxylase act as carboxylating enzymes.

    A

    Only A and B, but not C

    B

    Only B and C, but not A

    C

    Only A and C, but not B

    D

    All A, B and C

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :C4 photosynthesis, Kranz anatomy, PEP carboxylase, RuBisCO, oxaloacetic acid

    3.

    ATP and NADPH produced in light reaction by the movement of electrons in ETC are used immediatly for

    A

    Oxidation of carbohydrate

    B

    Synthesis of sugar

    C

    Reduction of carbon dioxide

    D

    Both (b) and (c)

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, Light Reactions, Calvin Cycle, ATP, NADPH, Electron Transport Chain

    4.

    The enzymatic reactions incorporate CO2C{O_2} into the plants leading to the synthesis of sugar in

    A

    Stroma

    B

    Stroma lamella

    C

    Grana

    D

    Both (a) and (b)

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :photosynthesis, carbon fixation, chloroplast structure

    5.

    C4−{C_4} - plants differ from C3−{C_3} - plants in respect to

    A

    Number of Co2C{o_2} molecules used

    B

    Substrate, which accept the Co2C{o_2} molecules

    C

    The final product

    D

    Number of ATP formed

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :C3 photosynthesis, C4 photosynthesis, carbon fixation

    6.

    If the light becomes unavailable during photosynthesis then

    A

    Immediately biosynthetic process stops

    B

    Biosynthetic phase does not stops

    C

    Biosynthetic phase stopes forever

    D

    Biosynthetic phase continues for some time and then stops

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :photosynthesis, light-dependent reactions, light-independent reactions, carbon fixation

    7.

    For yielding one molecule of glucose, the Calvin cycle turns

    A

    Two times

    B

    Four times

    C

    Six times

    D

    Eight times

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Calvin cycle, Glucose synthesis

    8.

    In a CAM-plant, the concentration of organic acid

    A

    Increases during the day

    B

    Decreases or increases during the day

    C

    Increases during night

    D

    Decreases during any time

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :CAM photosynthesis, organic acid concentration

    9.

    In C3{C_3} plants, the first stable product of photosynthesis during dark reaction is

    A

    PGAL

    B

    RuBP

    C

    PGA

    D

    OAA

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Photosynthesis, Calvin Cycle, C3 plants, Carbon fixation

    10.

    Scientist believed that since the first product was …A… acid, the primary acceptor would be …B… carbon compound; they spent many years trying to identify a 2-carbon compound before they discovered …C… carbon compound (RuBP). Complete the given statement with the correct combination of options

    A

    A-C3_3; B-2, C-5

    B

    A-C3_3; B-5, C-2

    C

    A-C4_4; B-5, C-2

    D

    A-C4_4; B-2, A-5

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :photosynthesis, carbon fixation, Calvin cycle

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