Most abundant protein on earth is:
Correct answer: C. Rubisco
- A. Keratin
- B. RuBP
- C. Rubisco
- D. Fibrinogen
Explanation
Rubisco, or ribulose-1,5-bisphosphate carboxylase/oxygenase, is the most abundant protein on Earth due to its essential role in the Calvin cycle of photosynthesis. It catalyzes the fixation of carbon dioxide, which is a critical process for the synthesis of organic compounds in plants, algae, and some bacteria. While keratin, RuBP, and fibrinogen are significant in their respective roles, they do not match Rubisco in abundance or function in photosynthesis.
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