Which one is the most abundant protein in the animal world?

(a) Trypsin                     (b) Haemoglobin

(c) Collagen                    (d) Insulin

(c) Collagen is the most abundant protein (structural protein) in the animal world while Ribulose Carboxylase Oxygenase (RUBISCO) is the most abundant protein in the whole of a plant world.

Difficulty Level:

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