Proteins

Question 1

what are Structural proteins ?

Answer 1

provide support – fibrous proteins (eg collagen and elastin in connective tissue; keratin in claws, horns, beaks, nails, hooves and feathers) – globular proteins (eg actin and tubulin) – membrane proteins embedded in the lipid bilayer.

Question 2

What are transport proetiens?

Answer 2

involved in the movement of other substances (eg haemoglobin in red blood cells); carrier and channel proteins.

Question 3

What are storage proteins

Answer 3

store amino acids (eg ovalbumin, casein and ferritin).

Question 4

What are defence proteins

Answer 4

antibodies and interferons.

Question 5

What are hormones ?

Answer 5

chemical signals that travel in the blood to act on target cells.(eg insulin and glucagon)

Question 6

What are receptor proteins?

Answer 6

involved in the response of a cell to chemical stimuli.

Question 7

What are enzymes ?

Answer 7

Enzymes speed up the rate of chemical reactions without undergoing any change themselves.

Question 8

What is a phenotype ?

Answer 8

The characteristics of a cell or organism, determined by its protein expression