Q.

Which of the following is maximum in chloroplast
 a) RuBP carboxylase        b) Hexokinase        c) Phosphatase        d) Nuclease

1 A
2 B
3 C
4 D

Ans.

(a) RuBPcarboxylase (RUBISCO) is the most abundant protein in chloroplasts and probably on earth. It catalyses the carboxylation of ribulose 1-5 bisphosphate to form two molecules of 3-phosphoglyceric acid in C_3-cycle of photosynthesis.