3.7 Type Of Proteins

Question 1

What are globular proteins

Answer 1

Compact,water soluble,spherical proteins.Formed when tertiary structure fold so hydrophobic R group is in the centre and hydrophilic r groups on the outside

Question 2

Give an example of a globular protein

Answer 2

Insulin- hormone needed for the regulation of glucose concentration

Question 3

What are conjugated proteins

Answer 3

Globular proteins that contain a non-protein component ( a prosthetic group)

Question 4

What structure is haemoglobin

Answer 4

Quaternary 4 polypeptides - two alpha helix two beta pleated sheets

Question 5

What does haemogkobic consist that allows it to transport oxygen

Answer 5

Iron II

Question 6

What is the enzyme catalase for and what structure

Answer 6

Quaternary to catalyse reactions

Question 7

Fibrous proteins

Answer 7

For long insoluble molecules due to high proportion of amino acids with hydrophobic r groups in primary structure

Question 8

Examples of fibrous proteins

Answer 8

Collagen keratin elastin

Question 9

Keratin

Answer 9

Fibrous protein in hair skin nails - sultry amino acids strong disulphide bonds = strong inflexible insoluble materials

Question 10

Elastin

Answer 10

Fibrous protein in elastic fibres which are present in walls of blood vessels and alveoli = expand flexible but return to normal size and shape. Quaternary protein

Question 11

Collagen

Answer 11

Fibrous protein connective tissue in skin tendons ligaments nervous system
Flexible