Question

If a $C_4$ plants needs to fix $5C{O}_2$ then how many ATP molecules does it use in its bundle sheath cells to do so?

• A. 20
• B. 15
• C. 25
• D. 18

Answer 1

Answer: (B)

15

To fix 6 $C{O}_2$ in bundle sheath cells $C_4$ plants require 18 ATP

So, for 1 $C{O}_2$ 3 ATP are required

if 5CO2 are fixed 5 x 3 =15 ATP are required.

So, the correct option is '15'.