fibrous and globular protiens

Question 1

example of a globular protein

Answer 1

haemoglobin, enzymes

Question 2

properties of globular proteins

Answer 2

spherical in shape,
hydrophobic R groups on the inside, hydrophilic R groups on the outside therefore they are soluble in water,
can form very specific shapes to carry out specific functions

Question 3

roles that globular proteins carry out

Answer 3

transport (haemoglobin), hormones (insulin), enzymes (pepsin)

Question 4

why is haemoglobin a conjugated protein

Answer 4

it has a prosthetic group attached to each polypeptide chain

Question 5

define prosthetic group

Answer 5

a non protein component which is necessary for the protein to carry out its function

Question 6

what is an example of a globular protein that is a hormone

Answer 6

insulin

Question 7

role of peptin

Answer 7

breaks down polypeptides into shorter polypeptide chains

Question 8

properties of fibrous proteins

Answer 8

they contain long polypeptide chains with repeating sequences of amino acids,
amino acids have a non-polar r group so they are insoluble in water,
polypeptide chains are able to form fibres so they are strong

Question 9

roles of fibrous proteins

Answer 9

forms tendons (collagen),
hardens fingernails (keratin),
makes tissues stretchy (elastin)