Proteins

Question 1

What is the name for a monomer of protein?

Answer 1

Amino acids

Question 2

What type of bond joins them together?

Answer 2

Peptide bond

Question 3

Describe how you would test for the presence of a protein

Answer 3

Add biuret reagent to solution and mix

If protein is present solution will turn lilac/purple

Question 4

What is the name for 2 monomers of protein joined?

Answer 4

Dipeptide

Question 5

What is the name for a string of protein monomers?

Answer 5

Polypeptide

Question 6

Describe the primary structure of protein

Answer 6

A sequence of amino acids

Question 7

Describe the secondary structure

Answer 7

Hydrogen bonds between amino group + carboxyl groups

Alpha helix + beta pleating

Question 8

Describe the tertiary structure

Answer 8

Between R groups

Hydrogen bonds

Ionic bonds

Disulphide bridges

Question 9

Describe quaternary structure

Answer 9

More than 1 polypeptide

Question 10

Give 2 examples of important proteins in organisms

Answer 10

Enzymes

Antibodies

Transport proteins

Structural proteins (collagen + keratin)