Most Abundant Proteins: Collagen & RuBisCO — NEET Biology
✅ Asked in NEET 2026Collagen is the most abundant protein in animal world and Ribulose bisphosphate Carboxylase-Oxygenase (RuBisCO) is the most abundant protein in the whole of the biosphere.
NTA tests your knowledge of the most abundant proteins in different biological contexts. Collagen is the most abundant protein in the animal kingdom (found in connective tissues, skin, bones), while RuBisCO is the most abundant protein globally in the entire biosphere (found in plant chloroplasts). Students commonly confuse which protein is most abundant where—some think RuBisCO is most abundant in animals, or vice versa. Remember: Collagen = animals/vertebrates only; RuBisCO = overall biosphere (includes all plants worldwide). This distinction is repeatedly tested because it checks conceptual understanding of protein distribution across ecosystems.
This paragraph was tested 4 times in NEET.
Match List I with List II — A. Trypsin, B. Morphine, C. Concanavalin A, D. Collagen.
Match List I with List IIList I A. GLUT-4 B. Insulin C. Trypsin D. Collagen List II I. Hormone II. Enzyme III. Intercellular ground substance IV. Enables glucose transport into cells Choose the option with correct matches:
Match List-I with List-IIList-I A. Collagen B. GLUT-4 C. Trypsin D. RuBisCO List-II I. Enzyme II. Most abundant enzyme in biosphere III. Most abundant protein in animal world IV. Enables glucose transport into cells Choose the correct answer:
Which one of the following is the most abundant protein in the animals? (NEET 2020)
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