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

Name one essential amino acid

1. Methionine

2. Alanine

3. Glutamate

4. Proline

An extra carboxylic group present in 

1. Aspartate

2. Lysine

3. Tyrosine

4. Phenylalanin

Zwitterions are ionized species of

1. Acidic amino acids

2. Basic amino acids

3. Neutral amino acids

4. All of these

Non-essential amino acids

1. Must be obtained from

2. Are synthesized in our body

3. Are not needed in our diet

4. Both (2) & (3)

The given structure represents a

1. Glycolipid

2. Steroid

3. Phospholipid

4. Lipoprotein

Fats and oils are

1. Glycolipids

2. Triglycerides

3. Phospholipids

4. Conjugated lipid

Which of the following enzymes is used to join bits of DNA?

(1) Ligase

(2) Primase

(3) DNA polymerase

(4) Endonuclease

Which transports glucose into cells is

1. Trypsin

2. Keratin

3. Haemogiobin

4. GLUT-4