What macromolecules is the horn of a rhinoceros made of?

Answer 1

It was common belief that rhinoceros horns were made of compressed hair, but that has been dispelled. Rhino horn is mostly keratin, and the core of it is made from dense mineral deposits of calcium and melanin.

Answer 2

Keratin, a type of protein found in horns, hair and nails.

Answer 3

The horn of a rhinoceros is mostly made out of keratin, the same protein that makes up hair and fingernails.

Answer 4

The horn of a rhinoceros is primarily composed of keratin, which is a protein. Keratin is a tough and fibrous structural protein found in the horns, hair, nails, and hooves of animals.