proteins

Question 1

what is the monomer of a protein?

Answer 1

amino acids

Question 2

what is a dipeptide?

Answer 2

2 amino acids joined together

Question 3

what is a protein?

Answer 3

one or more polypeptides

Question 3

what is a polypeptide?

Answer 3

more than 2 amino acids joined together

Question 4

what is the structure of an amino acid?

Answer 4

amino group (H2N)
hydrogen
variable group (R)
carboxyl group (COOH)
carbon in centre

Question 5

what is the primary structure of a protein?

Answer 5

sequence of amino acids

Question 6

what is the secondary structure of a protein?

Answer 6

hydrogen bonds form between amino acids so they coil to an alpha helix r fold to a beta pleated sheet

Question 7

what is the tertiary structure of a protein?

Answer 7

coils or fold further
hydrogen and ionic bonds form
disulfide bridges form

Question 8

what is the quaternary structure of a protein?

Answer 8

how multiple polypeptide chains are assembled together

Question 9

what is the biuret test?

Answer 9

add sodium hydroxide solution
add copper sulfate solution
positive = purple