Which of following proteins is soluble in water?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Insulin
Insulin is a globular protein, and globular proteins are usually soluble in water.
Why the other options are incorrect
Option (1) Myosin — Incorrect. The fibrous protein of muscles; insoluble in water.
Option (2) Keratin — Incorrect. The fibrous protein of hair, nails and wool; insoluble in water.
Option (3) Silk — Incorrect. Silk protein (fibroin) is fibrous, so silk does not dissolve in water.
NCERT (2026-27 edition):
Fibrous Proteins
