Optimum temperature conditions for photosynthesis in `C_(3)` and `C_(4)` plants are respectively

Options

A. `10^(@)C-25^(@)C` and `30^(@)45^(@)C`
B. `30^(@)C-45^(@)C` and `10^(@)C-25^(@)C`
C. `0^(@)C-10^(@)C` and `10^(@)C-30^(@)C`
D. `25^(@)C-30^(@)C` and `40^(@)C-50^(@)C`.

Answer

A

Explanation

Active site of RuBisCO for carboxylation and oxgenation is the same. The enzyme has more affinity for `CO_(2)` as compared to oxygen. Active oxygenation occurs only when `CO_(2):O_(2)` ratio favours it.