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

Proteins are 

1. Macromolecules
2. Homopolymers
3. Micromolecules
4. Polymers of starch

Tick mark the incorrect statement about adult haemoglobin

1. it is made up of four sub-units

2. Two sub-units are of $\alpha$-type and two sub-units of $\beta$-type

3. It has quartemary structure of protein

4. It is a simple protein 

Which of the following structure of protein is absolutely necessary for the many biological activites of proteins

1. Primary

2. Secondary

3. Tertiary

4. Quaternary