Globular proteins

Question 1

globular properties

Answer 1

Globular proteins are compact, roughly spherical (circular) in shape and soluble in water

Question 2

Globular proteins form a …….shape when folding into their tertiary structure because:

Answer 2

spherical

their non-polar hydrophobic R groups are orientated towards the centre of the protein away from the aqueous surroundings

and
their polar hydrophilic R groups orientate themselves on the outside of the protein

Question 3

How does globular proteins orientation enable water solubility

Answer 3

This orientation enables globular proteins to be (generally) soluble in water as the water molecules can surround the polar hydrophilic R groups

Question 4

The solubility of globular proteins in water means they play important physiological roles as they can be

Answer 4

can be easily transported around organisms and be involved in metabolic reactions

Question 5

The folding of the protein due to the interactions between the R groups results in globular proteins having

Answer 5

specific shapes

Question 6

The folding of the protein due to the interactions between the R groups results in globular proteins having specific shapes. This also enables globular proteins to play physiological roles, for example,

Answer 6

, enzymes can catalyse specific reactions and immunoglobulins can respond to specific antigens

Question 7

Some globular proteins are conjugated proteins that contain a prosthetic group eg. haemoglobin which contains the prosthetic group called haem

what does conjugated mean

and prosthetic group

Answer 7

a protein that contains a non protein chemical group such as a conjugated group or co factor.

Proteins made up of juts amino acids are called simple proteins

a prosthetic means a non protein part of a protein molecule