Multiple Choice Questions

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Dimorphism of chloroplast is found in

  • C3 - plants

  • C4 - plants

  • CAM plants

  • Both (b) and (c)


B.

C4 - plants

C4 plants have Kranz anatomy. The chloroplasts of the mesophyll cells are smaller and have well developed grana, while the chloroplasts of bundle sheath cells are agranal, ie, dimorphic chloroplasts are found in Cplants.


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Photorespiration in C3 -plants starts from :

  • glycine

  • glycerate

  • phosphoglycolate

  • phosphoglycerate


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


Sunken stomata occur in

  • xerophytes

  • hydrophytes

  • mesophytes

  • opsanophytes


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


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

  • Heat

  • Inorganic chemicals

  • Organic chemicals

  • Light


Which of the following is photophosphorylation?

  • Production of ATP from ADP

  • Production of NADP

  • Synthesis of ADP from ATP

  • Production of PGA


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

  • guard cells

  • mesophyll cells

  • bundle sheath cells

  • epidermal cells


CO2 acceptor in C3 cycle is

  • OAA

  • RuBP

  • PEP

  • Malic acid


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Plants purify air by which process?

  • Photorespiration

  • Photosynthesis

  • Photophosphorylation

  • Transpiration


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