Q.

Which statement is wrong about photorespiration ?

Moderate

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By Expert Faculty of Sri Chaitanya

Photorespiration occurs in C3 plants and not C4 plants

There is no synthesis of ATP or NADPH

RuBisCO has higher affinity for CO2 than O2

RuBP binds with O2 to form two molecules of phosphoglycolate

answer is 4.

(Detailed Solution Below)

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Detailed Solution

RuBP instead of being converted to 2 molecules of PGA binds with O2 to form one molecule of phosphoglycerate and phosphoglycolate. C4 plants are special: They have a special type of leaf anatomy, they tolerate higher temperatures, they show a response to high light intensities, they lack a process called photorespiration and have greater productivity of biomass.In the photorespiratory pathway there is no synthesis of ATP or NADPH. In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of CO2 with the utilisation of ATP.RuBisCO has a much greater affinity for CO2 when the CO2 : O2is nearly equal.

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