Question

Number of carbon atom returning back to calvin cycle after photorespiration if number of RUBP undergoing photorespiration is 4
a)4 b)8 c)9 d)18
Pls explain

Answer 1

Answer is 8.

1 RUBP is a 5 carbon compound . In that 3 carbon are used . So the remaining would be 2.
Here we have 4 RUBP .
So number of carbon atom remaining is : 2× 4 =8