Proteins

Question 1

What are proteins?

Answer 1

Large organic molecules made of carbon, hydrogen, oxygen, nitrogen and often contain sulfur.

Question 2

Protein structure

Answer 2

Determines function

Question 3

Primary structure

Answer 3

The amino acids in a polypeptide chain and the order they appear in.

Question 4

Secondary structure

Answer 4

Weak hydrogen bonds form between some of the amino acids in the chain and make it coil into a helix.

Question 5

Proteins with a secondary structure

Answer 5

Proteins with a secondary structure are fibrous e.g. collagen, actin and myosin

Question 6

Tertiary structure

Answer 6

Proteins can wind up into tangled shapes using a variety of additional bonds.

Question 7

Proteins with a tertiary structure

Answer 7

Proteins with a tertiary structure are globular e.g. enzymes, hormones and antibodies

Question 8

Quarternary structure

Answer 8

Formed when several polypeptides become bonded together e.g haemoglobin