Globular proteins

Question 1

Globular proteins shape

Answer 1

They are roughly spherical in shape
very specific shapes; this allows them to carry out
very specific functions

Question 2

Globular proteins solubility

Answer 2

are soluble in water because they are roughly spherical in shape, with hydrophobic R groups on the inside and hydrophilic R groups on the outside

Question 3

Typical roles of globular proteins

Answer 3

they typically have metabolic roles

Question 4

Haemoglobin

Answer 4

a conjugated globular protein, made of 4 polypeptide chains and 4 haem prosthetic groups which contain Fe2+

Question 5

Insulin

Answer 5

A globular protein composed of two polypeptide chains, joined together by disulphide links.
The specificity of the shape allows binding to cell membrane receptors.

Question 6

Pepsin

Answer 6

A globular protein that has hydrogen bonds, disulphide link and a few basic R
groups to keep it functional in low pH stomach acid.