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Botany

Blazing goIITian

Joined:	21 Nov 2008
Post:	1020

27 Jan 2009 00:10:00 IST

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Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels becausefour

None

Photosynthesis in C₄ plants is relatively less limited by atmospheric CO₂ levels because

a. four carbon acids are the initial CO₂ fixation products

b. the primary fixation of CO₂ is mediated via PEP carboxylase

c. effective pumping of CO₂ into bundle sheath cells

d. RUBISCO in C₄ plants has higher affinity for CO₂

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vignesh the cooler version of newton

Blazing goIITian

Joined: 16 Mar 2008

Posts: 1801

27 Jan 2009 09:29:12 IST

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is the answer 2.. becoz primary fixation of CO2 is mediated via PEP CO enzyme which has much less affinity for O2 level and is better binder of CO2.....

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