Proteins

Question 1

What is the primary structure of proteins?

Answer 1

a single polymer chain that is a sequence of amino acids

Question 2

What is the secondary structure of proteins?

Answer 2

three-dimensional structure - folded single polymer chains

Question 3

What is the tertiary structure of proteins?

Answer 3

Again a single chain polymer chain but it has interactions with different parts of it (e.g. covalent bonds and hydrogen bonds) and R groups (side groups)

Question 4

What is the quaternary structure of proteins?

Answer 4

it is made up of multiple polypeptide chains

it can be tetramer, hexamer and fibrous

Question 5

What structure does haemoglobin have? and what is its function?

Answer 5

Quaternary, it transports oxygen

Question 6

What structure does actin have? and what is its function?

Answer 6

Quaternary and actin facilitates the movement of cells and also makes up part of the cytoskeleton

Question 7

What structure does integrin have? and what is its function?

Answer 7

Integrin is a transmembrane protein that is quaternary and attaches to actin within the cell. it forms the focal adhesions that also facilitate the movement of a cell along the ECM

Question 8

What structure does fibrin have? and what is its function?

Answer 8

Quaternary structure, most important protein in blood clotting

Question 9

How do we classify proteins?

Answer 9

proteins can be polar, non-polar or charged