3.7 Types Of Proteins

Question 1

Globular protein

Answer 1

Compact, water soluble, spherical. Form when proteins fold into tertiary structure.

Question 2

Insulin

Answer 2

Globular protein, involved in regulation of blood glucose conc.

Question 3

Prosthetic group

Answer 3

non-protein component tightly bound to a protein, often facilitating its function or structure.

Question 4

Haem group

Answer 4

Prosthetic group involved in oxygen transport and electron transfer in proteins

Question 5

Haemoglobin

Answer 5

Red, oxygen-carrying pigment in erythrocytes. Contains 4 haem groups

Question 6

Catalase

Answer 6

Quaternary protein containing 4 prosthetic haem groups. Involved in speeding up break down of hydrogen peroxide

Question 7

Fibrous protein

Answer 7

Formed from long insoluble molecules. Insoluble in water. Not folded into 3D shapes like globular proteins

Question 8

Keratin

Answer 8

Fibrous protein found in hair & skin, forms strong and inflexible materials. More bonds=less flexibility

Question 9

Elastin

Answer 9

Fibrous protein, found in blood vessel walls & alveoli. Quaternary protein

Question 10

Collagen

Answer 10

Fibrous protein, found in skin, tendons & ligaments. Forms long rope-like structure, flexible