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Question
The most important difference between C3 and C4 plants is ___________.
The most important difference between C3 and C4 plants is ___________.
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Solution
The correct option is B photorespiration
In C3 plants, some O2 binds with RuBisCO, which consumes some RuBP and reduces CO2 fixation. When RuBP binds O2, instead of forming two molecules of 3-PGA, it forms one molecule each of 3-PGA and phosphoglycolate in a pathway called photorespiration.
In C4 plants, photorespiration does not occur as they have a mechanism that increases the concentration of CO2 at the enzyme site, thereby preventing the binding of O2 to RuBP.
In C3 plants, some O2 binds with RuBisCO, which consumes some RuBP and reduces CO2 fixation. When RuBP binds O2, instead of forming two molecules of 3-PGA, it forms one molecule each of 3-PGA and phosphoglycolate in a pathway called photorespiration.
In C4 plants, photorespiration does not occur as they have a mechanism that increases the concentration of CO2 at the enzyme site, thereby preventing the binding of O2 to RuBP.
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