Question
Which of the following statements about RuBisCO is true?
NEET
Botany
Photosynthesis in Higher Plants
2025
NEET 2025
NEET Botany Question (2025) — Solution
Options
- A. It is active only in the dark
- B. It has higher affinity for oxygen than carbon dioxide
- C. It is an enzyme involved in the photolysis of water
- D. It catalyzes the carboxylation of RuBP
Answer
D. It catalyzes the carboxylation of RuBP
Step-by-step solution
Carboxylation is the most crucial step of the Calvin cycle where CO _2 is utilised for the carboxylation of RuBP. This reaction is catalysed by enzyme RuBP carboxylase. Since this enzyme also has an oxygenase activity, RuBisCO has higher affinity for carbon dioxide than oxygen.
Related: Botany — Photosynthesis in Higher Plants · All PYQ Banks