Question

$C_4$ pathway is advantageous over $C_3$ pathway in plants as it

• A. Occurs in relatively low $C{O}_2$ concentration
• B. Uses more amount of water
• C. Occurs in relatively low $O_2$ concentration
• D. Is less efficient in energy utilisation.

Answer 1

The correct option is A Occurs in relatively low $C{O}_2$ concentration

A) $C_4$ pathway occurs in relatively low ${CO}_2$ concentration as carbon dioxide is recycled and not wasted.

B) $C_4$ pathway uses lesser water than $C_3$ pathway
C) $C_4$ pathway occurs in the same oxygen concentration as $C_3$ pathway.
D) $C_4$ pathway is more energy efficient than $C_3$ pathway as it does not consume extra energy by avoiding the wastage of carbon dioxide.
So the correct answer is 'Occurs in relatively low ${CO}_2$ concentration'.