$\_\_\_\_$ is the most abundant protein in animal world and $\_\_\_\_$ is the most abundant protein

Question

$\_\_\_\_$ is the most abundant protein in animal world and $\_\_\_\_$ is the most abundant protein in the whole biosphere.\

Professor PC Thomas Classes · Answer

(a) : Keratin is a fibrous protein which forms external protective structures of animals like nails, hoofs, scales, hair, feathers, horny layer of skin, etc.