Question

DMLT 1ST YEAR CLASS TEST

DMLT 1ST YEAR CLASS TEST

BIOCHEMISTRY ( AMINO ACIDS AND PROTEINS).FULL TIME- 1 HOUR, FULL MARKS-40

1. The general structure of all amino acids are same except for ___________

2 points

a) Lysine

b) Glycine

c) Proline

d) Alanine

Clear selection

2. An amino acid is an amphoteric molecule.

2 points

a) True

b) False

Clear selection

3. Which of these amino acids are not optically active?

2 points

a) Cysteine

b) Lysine

c) Arginine

d) Glycine

Clear selection

4. Which of these are used to measure optical activity?

2 points

a) Polarimeter

b) Planometer

c) Psychrometer

d) Photometer

Clear selection

5. Name the amino acid, which exists in two non-superimposable mirror images of each other.

2 points

a) Epimer

b) Anomer

c) Enantiomer

d) Chiral carbon

Clear selection

6.Which of these are rare amino acid in a protein?

2 points

a) Leucine and serine

b) Lysine and glutamic acid

c) Tryptophan and methionine

d) Leucine and lysine

7. In which amino acid Imidazole group, an aromatic ring found?

2 points

a) Lysine

b) Arginine

c) Histidine

d) Glutamate

8.How is the secondary structure of a protein stabilized?

2 points

a) Van der wall forces

b) Hydrogen bonding

c) Covalent bond

d) Hydrophobic bond

9.How many amino acid residues are there in per turn of α-helix?

2 points

a) 3.6

b) 4.6

c) 3.0

d) 2.5

10.Which among the following is not polymeric?

2 points

(a) Carbohydrates

(b) Nucleic acids

(c) Proteins

(d) Lipids

11.Which of the following amino acids has to be supplemented in the diet?

2 points

(a) phenylalanine

(b) cysteine

(c) glutamine

(d) asparagine

12.What is a bond between amino acids called?

2 points

(a) Ionic bond

(b) Acidic bond

(c) Peptide bond

(d) Hydrogen bond

13.Which of the following techniques is used to determine the protein structures?

2 points

(a) X-ray crystallography

(b) Kryptonics X-ray vision

(c) Magnetic resonance imaging (MRI)

(d) None of the above

14.Which of the following cell organelles is involved in the process of protein synthesis?

2 points

(a) Vesicles

(b) Ribosomes

(c) Synchrotrons

(d) Mitochondria

15.Peptide bond is a _________

2 points

a) Covalent bond

b) Ionic bond

c) Metallic bond

d) Hydrogen bond

16.Unfolding of a protein can be termed as _________

2 points

a) Renaturation

b) Denaturation

c) Oxidation

d) Reduction

17.A tripeptide has _________

2 points

a) 3 amino acids and 1 peptide bond

b) 3 amino acids and 2 peptide bonds

c) 3 amino acids and 3 peptide bonds

d) 3 amino acids and 4 peptide bonds

18.Which type of prosthetic group is present in nucleoproteins?

2 points

A. Neurons

B. Nerve cells

C. Nucleic acid

D. Axons of nerve cells

19.Which type of proteins are also known as denatured proteins?

2 points

A. Primary proteins

B. Secondary proteins

C. Conjugated proteins

D. None of the above

20.Which of the following is the example of storage proteins?

2 points

A. Dehydrogenase

B. Myoglobin

C. Hemoglobin

D. Immunoglobin​

Answer 1

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