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Photosynthesis in Higher Plants

Short Answer Type

41. Why does rate of photosynthesis in plants growing under the forest canopy show marked decrease ?

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42. What is the abvantage of having more than one pigment molecule in a photocentre ?

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Long Answer Type

43. Describe about non-cyclic photophos-phorylation.

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Short Answer Type

44. Write a note on phycobilins.

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Long Answer Type

45. Draw a schematic diagram of C₃ cycle.

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Short Answer Type

46. What are the steps common to C₃ and C₄ cycle ?

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47.
What is Kranz anatomy?

Kranz anatomy is the special arrangement of the cells found in the C₄ plants.

The characteristics of Kranz anatomy are:

The bundle sheath cells form several layers around the vascular bundles. The chloroplasts of bundle sheath cells are large and more in number, they have thick walls and no intercellular spaces. Mesophyll cells are undifferentiated and arranged in concentric layers around the vascular bundles.

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