Question

Answer each question with explanations

1. Given that van der Waals attraction is a weak attractive force, it does not play any important role in the cell.

a. True

b. False

2. When a protein is phosphorylated by a kinase, the phosphate is linked to the protein through _____ bond.

a. Amide

b. Anhydride

c. Phosphoester

3. The backbone of a fat, glycerol is linked with fatty acid through _____ bond.

a. Amide

b. Anhydride

c. ester

4. What kind of bond is not present in a typical phospholipid?

a. Ester bond

b. Phosphoester bond

c. Amide bond

5. What is the ratio of GTP (5mM) to Ga?

a. 38

b. 385

c. 3,846

d. 38,461

Answer 1

Answer 1

The given statement is " False".

Explanation

Although vanderwaal forces are weak among chemical bonds but plays a crucial role in maintanence of lipid bilayer or cell membrane, holding proteins together and in reinforce the formation of 3D structure of molecules.

Answer 2

Option C is correct i.e " Phosphoester bond".

Explanation

Kinase transfers phosphate group from ATP molecules in which phosphate groups are attached to one another via phosphoanhydride bond and the bond between amino acid of protein and phosphate group is phosphoester bond.

Answer 3

Option C is correct i.e " Ester bond".

Explanation

Glycerol attached to fatty acid chains via ester bonds.

Answer 4

Option C is correct i.e " Amide bond".

Explanation

Amide bond is form between the amino acid residues of a peptide not required for phospholipids..