Which of the following is the correct structure of tyrosine?

How many amino acids are linked together by $(n-1)$ amide bonds?

Which one of the following is an amino acid?

Which of the following reagents gives a blue colour with proteins?

Given below are two statements $:$
Statement $(I):$ On hydrolysis,oligopeptides give rise to a fewer number of $\alpha$-amino acids,while proteins give rise to a large number of $\beta$-amino acids.
Statement $(II):$ Natural proteins are denatured by acids,which convert the water-soluble form of fibrous proteins to their water-insoluble form.
In the light of the above statements,choose the most appropriate answer from the options given below $:$

Identify the correct set of functional groups present in aspartame,an artificial sweetener.