Protein Structures

Question 1

Primary structure

Answer 1

Sequence of amino acids linked together to form a polypeptide chain

Question 2

Secondary structure

Answer 2

2D folded structures: alpha helix and Beta helix [held by hydrogen bonds]

Question 3

Tertiary structure

Answer 3

The overall 3-dimensional [3D] structure

Question 4

Quaternary structure

Answer 4

Consists of more than one polypeptide