L5 p2 - Fibours + Globular Proteins

Question 1

What is the structure of fibrous proteins?

3

Answer 1

Made up of repeating sequence of amino acids

Long, thin parallel chains

Secondary structure most important

Question 2

What are the properties of fibrous proteins?

1

Answer 2

Insoluble in water

Question 3

What is the function of fibrous proteins?

1

Answer 3

Important structural functions in the body, but metabolically inactive

Question 4

What are examples of fibrous proteins?

4

Answer 4

Collagen - tendons + bone

Myosin - muscles

Keratin - hair

Elastin - lungs + blood vessels

Question 5

What is the structure of globular proteins?

4

Answer 5

Very precise primary structure made up of non-repeating sequence of amino acids

Chains always same length

Very specific space

Tertiary structure important - folded in very specific way

Question 6

What are the properties of globular proteins?

1

Answer 6

Soluble in water

Question 7

What are the functions of globular proteins?

1

Answer 7

Metabolically active (enzyme reactions + immunology)

Question 8

What are examples of globular proteins?

1

Answer 8

Enzymes

Antibodies

Some hormones - insulin

Membrane transport proteins

Haemoglobin (quaternary example)