Which one of the following amino acids is an essential part of human diet ?

1. Glycine

2. Phenylalanine

3. Serine

4. Aspartic acid

Which is an essential amino acid? 
1. Serine
2. Aspartic acid
3. Glycine
4. Phenylalanine

Identify two amino acids that contain sulphur:

1. Asparagine and Glutamine

2. Lysine and arginine

3. Proline and hydroxyproline

4. Cysteine and methionine

Identify the correct statement regarding the structure of a molecule shown in the given diagram:
   

I. It is an alpha amino acid
II. The configuration shown is called zwitterion
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II

An aromatic amino acid which is not an essential amino acid is the precursor of catecholamines [adrenaline/noradrenaline/dopamine] and also involved in the synthesis of iodothyronines is:
1. Tryptophan
2. Threonine
3. Phenylalanine
4. Tyrosine

Identify the basic amino acid from the following.

A basic amino acid among the following is

1. Glutamate

2. Aspartate

3. Lysine

4. Valine

The structure of protein which gives a three dimensional view is

1. Primary structure

2. $\alpha -helix$

3. $\beta -pleated sheet$

4. Tertiary structure

An aromatic amino acid is

1. Tryptophan

2. Glutamate

3. Arginine

4. Valine