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?

PLANT PHYSIOLOGY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	C4
B	CAM
C	Nitrogen fixer
D	C3

Explanation:

Detailed explanation-1: -Final answer: A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures, and has improved the efficiency of nitrogen utilization. This plant belongs to the C4 group.

Detailed explanation-2: -Photorespiration occurs usually when there is a high concentration of oxygen. Under such circumstances, RuBisCO, the enzyme that catalyzes the carboxylation of RuBP during the first step of the Calvin cycle, functions as an oxygenase. Some O2 does not bind itself to RuBisCO and hence CO2 fixation is decreased.

Detailed explanation-3: -Photorespiration replaces carbon dioxide in the Calvin cycle with oxygen. As a result, sugar is not created since carbon is not fixed, and the process uses more oxygen. As a result, photorespiration reduces photosynthetic output.

There is 1 question to complete.

LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

PLANT PHYSIOLOGY