Question

Which one of the following biomolecules is insoluble in water?

• A. $\alpha$-Keratin
• B. Haemoglobin
• C. Ribonuclease
• D. Adenine

Answer 1

Answer: (A)

$\alpha$-Keratin

Answer 2

$\alpha$-keratin is a water insoluble fiberous protein. It is the major constituent of nail, hair and skin. It cannot be digested in human body. Haemoglobin is a conjugate protein in blood. Adenine is a nitrogenous base of DNA and RNA.