Photosynthesis in Higher Plants

Multiple Choice Questions

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Sunken stomata occur in

  • xerophytes

  • hydrophytes

  • mesophytes

  • opsanophytes

A.

xerophytes

A sunken stomata is a stomata in a small pit, which protects the escaping water vapor from air currents, decreasing water loss from the leaf. Sunken stomata are commonly found in plants in arid environments as one of their adaptations to preserve water.

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    CO2 acceptor in C3 cycle is

    • OAA

    • RuBP

    • PEP

    • Malic acid

    Answer

    From which of the following, photosynthetic autotrophs receive their energy?

    • Heat

    • Inorganic chemicals

    • Organic chemicals

    • Light

    Answer

    Plants purify air by which process?

    • Photorespiration

    • Photosynthesis

    • Photophosphorylation

    • Transpiration

    Answer

    Photorespiration in C3 -plants starts from :

    • glycine

    • glycerate

    • phosphoglycolate

    • phosphoglycerate

    Answer
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    The order of occurrence of the cytochromes in the F1 particle is

    • cyt-b, cyt-c, cyt-a-cyt a3

    • cyt-c, cyt-b, cyt-a-cyt a3

    • cyt-a, cyt-b, cyt-c-cyt a3

    • cyt-a3, cyt-a, cyt-c-cyt b

    Answer

    Dimorphism of chloroplast is found in

    • C3 - plants

    • C4 - plants

    • CAM plants

    • Both (b) and (c)

    Answer

    Which of the following is photophosphorylation?

    • Production of ATP from ADP

    • Production of NADP

    • Synthesis of ADP from ATP

    • Production of PGA

    Answer

    Chemiosmotic theory of ATP synthesis, in the chloroplast and mitochondria, is based on :

    • proton gradient

    • membrane potential

    • accumulation of K ions

    • accumulation of Na ions

    Answer
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    The first carbon dioxide fixation in C4 pathway occurs in chloroplasts of

    • guard cells

    • mesophyll cells

    • bundle sheath cells

    • epidermal cells

    Answer
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