proteins

Question 1

Primary structure of proteins

Answer 1

Amino acids are joined by peptide bonds to form polypeptide chains which are sequences of amino acids.

Question 2

Secondary structure of proteins

Answer 2

Polypeptides can be arranged in an alpha helix or beta pleated sheet. An alpha helix is a tight twisted strand where the polypeptides are tightly packed. In a beta pleated sheet the polypeptides are in zig-zag lines. Both contain hydrogen bonds between parts of the chain.

Question 3

Quaternary structure of proteins

Answer 3

Quaternary structure is made up of more than one type of polypeptide and contains a prosthetic group which is a non-protein. An example is haemoglobin as it’s made up of multiple polypeptides.

Question 4

What monomer are proteins made from

Answer 4

Amino acids

Question 5

Tertiary structure

Answer 5

The 3D structure of a protein that is specific to a proteins function