Multiple choice

Which one of the following enzymes fixes CO2 into organic form?

  1. Ribulose 5-phosphate kinase

  2. Ribulose 1, 5-bisphosphate carboxylase

  3. Pyruvate dehydrogenase

  4. Carbonic anhydrase

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCO) is the primary enzyme responsible for fixing carbon dioxide into organic molecules during the Calvin cycle in photosynthesis. The other enzymes listed serve different roles in metabolic pathways.