1.

    With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

    A

    Tomato is a greenhouse crop which can be grown in CO2C{O_2} enriched atmosphere for higher yield

    B

    Light saturation for CO2C{O_2} fixation occurs at 10% of full sunlight

    C

    Increasing atmospheric CO2C{O_2} concentration upto 0.05% can enhance CO2C{O_2} fixation rate

    D

    C3{C_3} plants responds to higher temperatures with enhanced photosynthesis while C4{C_4} plants have much lower temperature optimum

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :photosynthesis, factors affecting photosynthesis, CO2 concentration, light intensity, temperature effect on C3 and C4 plants

    Related Questions

    1.

    CO2C{O_2} released in bundle sheath is used in the

    A

    C4−{C_4} - cycle

    B

    C3−{C_3} - cycle

    C

    Respiration

    D

    Sugar break down processes

    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, C4 cycle, Bundle Sheath Cells

    2.

    If a plant is exposed to 14CO2^{14}CO_2 in the dark and then transferred to light, the 14C^{14}C label will appear first in which of the following carbohydrates?

    A

    Starch

    B

    Sucrose

    C

    Triose phosphates (glyceraldehyde-3-phosphate and dihydroxyacetone phosphate)

    D

    Fructose-1,6-bisphosphate

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Calvin Cycle, Carbon Fixation, Carbohydrate Synthesis

    3.

    PEPcase has an advantage over RuBisCo. The advantage is

    A

    RuBisCo combines with O2{O_2}but PEPcase do not

    B

    RuBisCo combines with NO2{O_2} but PEPcase do not

    C

    RuBisCo conserve energy but PEPcase do not

    D

    PEPcase is present in both mesophyll cells and bundle sheath cells but RuBisCo is not

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

    4.

    Which of the following characteristics out of I, II, III, IV are exhibited by C4−{C_4} - plant?

    I. Kranz anatomy

    II. Oxaloacetic acid

    III. Large bundle sheath cells

    IV. Found only in desert area

    A

    I, II and III

    B

    I, II and IV

    C

    II, III and IV

    D

    III, I and IV

    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, Oxaloacetic acid, bundle sheath cells, plant adaptation

    5.

    A scientist disrupted the chloroplast and separated the stroma from lamella. For fixing CO2C{O_2} he supplied stroma with

    I. ATP

    II. NADPH

    III. Glucose

    Select the correct option

    A

    I and III

    B

    III and II

    C

    I and II

    D

    I, II and III

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :photosynthesis, calvin cycle, stroma, ATP, NADPH

    6.

    If a plant is placed in an environment with very low carbon dioxide concentration, which aspect of photosynthesis would be MOST directly affected?

    A

    Light-dependent reactions

    B

    Water splitting

    C

    Carbon fixation in the Calvin cycle

    D

    Oxygen production

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    PYQ YEAR: 2017
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Photosynthesis, Calvin Cycle, Carbon Fixation

    7.

    In an experiment, chloroplasts were made acidic by soaking them in acidic solution. What will happen if this chloroplast is transferred to a solution having basic pH?

    A

    ATP formation takes place

    B

    No ATP formation takes place

    C

    NAD formation takes place

    D

    Sugar formation takes place

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Chemiosmosis, ATP synthesis, pH gradient, Photosynthesis

    8.

    Which of the following elements is an activator for both Ribulosebisphosphate carboxylase oxygenase and phosphoenol pyruvate carboxylase in photosynthetic carbon fixation?

    A

    Mg2+M{g^{2 + }}

    B

    Zn2+Z{n^{2 + }}

    C

    Ca2+C{a^{2 + }}

    D

    SO24−S{O^2}_4 -

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :enzyme activation, photosynthesis, cofactors, Rubisco, PEP carboxylase

    9.

    Presence of bundle sheath is a characteristic of

    A

    Xerophytic plants

    B

    Members of grass family

    C

    C4−{C_4} - plants

    D

    C3−{C_3} - plants

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Plant anatomy, Photosynthesis, C4 pathway, Bundle sheath

    10.

    Which of the following statements regarding C4−{C_4} - plants is false?

    A

    They lack RuBisCo

    B

    They lack Kranz anatomy

    C

    They fix CO2 into a 4-carbon compound

    D

    They have a higher temperature optimum for photosynthesis

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Photosynthesis in Higher Plants
    🎯Topic:Dark Phase
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :C4 Photosynthesis, Carbon Fixation, Plant Anatomy, Enzyme Function

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