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

How many water molecules are released during the formation of a dipeptide when two amino acids bind (in $-H_2O$)?

Name the main constituent of the food,in the absence of which one cannot live.

Identify the $X$ figure.

What is a conjugated protein called if it contains a carbohydrate as a prosthetic group?

Assertion: Human diet should compulsorily contain glycine,serine,and tyrosine.
Reason: Essential amino acids cannot be synthesized in the human body.