Collagen Most Abundant Animal Protein, RuBisCO Most Abundant Biosphere Protein
✅ Asked in NEET 2026Match List I with List II: List I: A. Trypsin B. Morphine C. Concanavalin A D. Collagen List II: I. Most abundant protein in the animal world (intercellular ground substance) II. Lectin III. Proteolytic enzyme IV. Alkaloid (secondary metabolite) Choose the correct answer from the options given below: (NEET 2026 — cancelled)
Match List I with List II: List I: A. Trypsin B. Morphine C. Concanavalin A D. Collagen List II: I. Most abundant protein in the animal world (intercellular ground substance) II. Lectin III. Proteolytic enzyme IV. Alkaloid (secondary metabolite) Choose the correct answer from the options given below: (NEET 2026 — cancelled)
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)
Answer & NCERT explanation
Correct answer: A — A-III, B-IV, C-II, D-I
Trypsin is a proteolytic enzyme; morphine is an alkaloid (secondary metabolite); concanavalin A is a lectin; collagen is the major intercellular ground substance.
Read more NCERT concept on the PYQ
Collagen 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.
Two SUPERLATIVE proteins for NEET: COLLAGEN is the MOST ABUNDANT PROTEIN IN THE ANIMAL WORLD — it forms the intercellular ground substance of connective tissues (skin, bone, tendon, ligament, cartilage). RIBULOSE BISPHOSPHATE CARBOXYLASE-OXYGENASE (RuBisCO) is the MOST ABUNDANT PROTEIN IN THE WHOLE BIOSPHERE — present in chloroplasts of all photosynthetic organisms; catalyses the first step of carbon fixation in the Calvin cycle. Other NEET-relevant protein examples by function: TRYPSIN = proteolytic ENZYME; INSULIN = HORMONE (pancreatic β-cells); GLUT-4 = glucose TRANSPORTER (enables glucose entry into cells); CONCANAVALIN A = LECTIN (carbohydrate-binding protein from jack bean); MORPHINE = ALKALOID (NOT a protein — opium poppy secondary metabolite).
NEET tested this set 4 times (2026, 2024×2, 2020). Lock the superlatives: COLLAGEN = most abundant in ANIMAL world; RuBisCO = most abundant in BIOSPHERE (worldwide, all life included). NEET 2024 four-match: Collagen=intercellular ground substance, GLUT-4=glucose transport, Trypsin=enzyme, RuBisCO=most abundant enzyme in biosphere → C. Memory: 'RuBisCO rules the biosphere' (because photosynthesis is everywhere). NEET 2020: most abundant animal protein → collagen (NOT haemoglobin, NOT lectin, NOT insulin).
Haemoglobin is the most abundant protein in animals and collagen is the most abundant protein in the biosphere.
COLLAGEN = most abundant in ANIMAL world (intercellular ground substance). RuBisCO = most abundant in BIOSPHERE (Calvin cycle enzyme in chloroplasts).
Collagen = animal #1. RuBisCO = biosphere #1. Trypsin = enzyme. Insulin = hormone. GLUT-4 = glucose transport. Morphine = alkaloid (not protein).
- COLLAGEN = most abundant protein in animal world (~25% of body protein); intercellular ground substance.
- RuBisCO = most abundant protein in biosphere; catalyses first step of carbon fixation in chloroplasts.
- Trypsin = proteolytic enzyme; Insulin = hormone; GLUT-4 = glucose transporter; Concanavalin A = lectin.
- Morphine = ALKALOID (secondary metabolite, NOT a protein) — opium poppy derivative.
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