The most abundant protein in the whole biosphere is.
Correct answer: A. Rubisco
- A. Rubisco
- B. Collagen
- C. Haemoglobin
- D. Albumin
Explanation
Rubisco, short for Ribulose-1,5-bisphosphate carboxylase/oxygenase, is the enzyme responsible for fixing carbon dioxide during the Calvin cycle of photosynthesis. It is the most abundant protein on Earth due to its central role in photosynthetic organisms.
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