1.

    Which of the following correctly describes the products of RuBisCo's oxygenation activity during photorespiration?

    A

    Two molecules of phosphoglycerate

    B

    Two molecules of phosphoglycolate

    C

    One molecule of phosphoglycerate and one molecule of phosphoglycolate

    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.

    To synthesize one molecule of glucose via the Calvin cycle, how many molecules of ATP and NADPH are needed?

    A

    12 ATP and 18 NADPH

    B

    18 ATP and 12 NADPH

    C

    6 ATP and 6 NADPH

    D

    3 ATP and 2 NADPH

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    PYQ YEAR: 2024
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, Calvin Cycle

    2.

    Photorespiration could easily be detected in

    A

    C3−{C_3} - plants

    B

    C4−{C_4} - plants

    C

    Both (a) and (b)

    D

    None of these

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

    3.

    If RuBisCo's oxygenase activity is inhibited in a plant, which of the following processes would be directly affected?

    A

    Calvin cycle

    B

    Light-dependent reactions

    C

    Krebs cycle

    D

    Photorespiration

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

    4.

    Water stress causes the stomata to …A… hence reducing the …B… availability.

    Here A and B refer to

    A

    close, CO2

    B

    open, O2

    C

    close, O2

    D

    open, CO2

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :stomata function, water stress, photosynthesis, carbon dioxide

    5.

    CAM pathway is observed in

    A

    Pineapple

    B

    Maize

    C

    Sunflower

    D

    Sugarcane

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

    6.

    In the absence of which of the following pairs of molecules would the Calvin cycle cease to function?

    A

    Light and Chlorophyll

    B

    ATP and NADPH

    C

    CO2CO_2 and H2OH_2O

    D

    Water and Light

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    PYQ YEAR: 2024
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Photosynthesis, Dark Reaction, Calvin Cycle, ATP, NADPH

    7.

    Generally, plants adapted to dry tropical conditions have

    A

    C2{C_2} pathway

    B

    C3{C_3} pathway

    C

    C5{C_5} pathway

    D

    C4{C_4} pathway

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Photosynthesis, Plant Adaptations, C4 Pathway, C3 Pathway

    8.

    Chloroplasts without grana are known to occur in

    A

    Bundle-sheath cells of C3−{C_3} - plants

    B

    Mesophyll cells of C4−{C_4} - plants

    C

    Bundle-sheath cells of C4−{C_4} - plants

    D

    Mesophyll cells of all plants

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

    9.

    The oxygenation activity of RuBisCo.{\rm{RuBisCo}}{\rm{.}} enzyme in photorespiration leads to the formation of

    A

    2{\rm{2}} molecules of 3 − C{\rm{3}}\,{\rm{ - }}\,{\rm{C}} compound

    B

    1{\rm{1}} molecule of 3 − C{\rm{3}}\,{\rm{ - }}\,{\rm{C}} compound

    C

    1{\rm{1}} molecule of 6 − C{\rm{6}}\,{\rm{ - }}\,{\rm{C}} compound

    D

    1{\rm{1}} molecule of 4 − C{\rm{4}}\,{\rm{ - }}\,{\rm{C}} compound and 1{\rm{1}} molecule of 2 − C{\rm{2}}\,{\rm{ - }}\,{\rm{C}} compound

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :photorespiration, RuBisCo, oxygenation, 3-phosphoglycerate, phosphoglycolate

    10.

    With reference to three Calvin cycles, which of the given options is correct for the following question? I. How many gross PGAL molecules are produces? II. Total, how many ATP molecules are required for synthesis of PGAL molecules? II. Total, how many NADPH2_2 molecules are required for the synthesis of obtained PGAL molecules?

    A

    18 PGAL, 54 ATP, 36 NADPH2_2

    B

    6 PGAL, 54 ATP, 36 NADPH2_2

    C

    6 PGAL, 18 ATP, 12 NADPH2_2

    D

    2 PGAL, 54 ATP, 36 NADPH2_2

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Calvin cycle, ATP consumption, stoichiometry

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