Why are C₄ plants able to photosynthesize with no apparent photorespiration? a. They do not participate in the Calvin cycle. b. They use PEP carboxylase to initially fix CO₂. c. They conserve water more efficiently. d. They exclude oxygen from their tissues.

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MubeenaD MubeenaD · Answer 1 · 2022-08-31T19:41:14+02:00

C₄ plants able to photosynthesize with no apparent photorespiration because (b) They use PEP carboxylase to initially fix CO₂.

C₄ plants, unlike the C₃ plants, form a four-carbon compound i.e. oxaloacetate as the first product of carbon fixation.

C₄ plants use an enzyme, PEP carboxylase, which is found only in mesophyll cells present in the leaves.

The enzyme PEP carboxylase has no affinity for oxygen as well as a much greater affinity for CO₂ as compared to rubisco.

In C4 plants, photorespiration does not take place due to a mechanism which increases the concentration of CO₂ at the enzyme site.

To learn more about PEP carboxylase here

https://brainly.com/question/14901700

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