Question

The major enzyme that catalyzes the reduction of carbon dioxide is called

• A. ribulose bisphosphate carboxylase (rubisco)
• B. phosphoglyceraldehyde (PGAL)
• C. PEP carboxylase (PEPcase)
• D. none of these

Answer 1

The correct option is A ribulose bisphosphate carboxylase (rubisco)

The enzyme RuBisCO incorporates carbon dioxide into an organic molecule and then the organic molecule is reduced. Carbon dioxide diffuses into the stroma of chloroplasts and combines with a five-carbon sugar, ribulose1,5-biphosphate (RuBP). The enzyme that catalyzes this reaction is referred to as RuBisCo, a large molecule that may be the most abundant organic molecule on the Earth.

So, the correct option is 'RUBISCO'.