Ncert Exercises & Solutions

The reaction that is responsible for the primary fixation of CO₂ is catalysed by

1. RUBP carboxylase

2. PEP carboxylase

3. RuBP carboxylase and PEP carboxylase

4. PGA synthase

In C₃ cycle RuBP carboxylase is used to fix atmospheric CO₂ whereas, in C₄, plants PEP carboxylase is involved in primary CO₂, fixation. So, both are used in CO₂ fixation but in different cycles.

Other options are incorrect because in (a) and (b) option is giving incomplete information and option (d) PGA synthase is not at all involved in CO₂ fixation.

Page 216, 219, XI NCERT

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions