Photosynthesis In Higher Plants
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A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
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C4
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CAM
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Nitogen-fixer
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C3
A.
C4
C4 plants show very little photorespiration and better utilisation of water.
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A plant requires magnesium for
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holding cells together
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protein synthesis
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chlorophyll synthesis
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cell wall development
C.
chlorophyll synthesis
Magnesium is important constituent of chlorophyll molecule.
A process that makes important difference between C3 and C4 plants is
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transpiration
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glycolysis
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photosynthesis
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photorespiration
D.
photorespiration
Photorespiration is a light dependent process which occurs in C3 plants. It is opposite to photosynthesis because during this process uptake of O2 and release of CO2 take place. Due to the presence of Kranz anatomy, C4 plants do not show photorespiration.
Anoxygenic photosynthesis is characteristic of
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rhodospirlllum
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Spirogyra
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Chlamydomonas
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Ulva
A.
rhodospirlllum
Anoxygenic photosynthesis (in which O2 is not released) is seen in Rhodospirillum, a purple non- sulphur bacteria. it helps an organism to trap light energy and store it as chemical energy.
C4 plants are more efficient in photosynthesis than C3 plants due to
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higher leaf area
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the presence of a larger number of chloroplasts
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the presence of thin cuticle
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Lower rate of photorespiration
B.
the presence of a larger number of chloroplasts
Like Plants, alage have cell walls contain either polysaccharides such as cellulose (a glucan) or a variety of glycoproteins or both. The inclusion of additional polysaccharide in algal cell walls is used as a feature for algal taxonomy. Mannas form microbibrils in the cell walls of a number of marine green alge including those from the genera Codium, Acetabularia as well as in the walls of some red algae including those from the gera Codium, Acteabularia as well as in the walls of some red algae like Porpyra.
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Mock Test Series
Mock Test Series