Biochemistry Keratin is present in both skin and nail. However, skin is much more flexible than the nail. This is because keratin of skin has? A Less number of disulfide bonds B Lesser number of salt bridges C Higher Na content D Different affinities of water 💡 Explanation Keratin is present in both skin and nail. However, skin is much more flexible than the nail. This is because keratin of skin has? ✓ Correct Answer: A. Less number of disulfide bonds