Protein Structure

Question 1

What are proteins made of?

Answer 1

amino acids

Question 2

How many types of amino acids are there?

Answer 2

20

Question 3

What groups are there in an amino acid?

Answer 3

amine group
R group
Carboxyl group

Question 4

Which group is different on each amino acid?

Answer 4

R group

Question 5

How do two amino acids join together?

Answer 5

condensation reaction

Question 6

What is a polypeptide?

Answer 6

chain of amino acids

Question 7

What is a protein?

Answer 7

One or more polypeptide chain that has been fully formed and folded.

Question 8

primary structure of protein

Answer 8

The sequence / order of amino acids joined by peptide bonds.

Question 9

secondary structure of protein

Answer 9

first level of folding

sections form either alpha helix or beta pleated sheet

held together with hydrogen bonds

Question 10

tertiary structure of protein

Answer 10

further folding caused by bonds forming between the R groups - creates the proteins final 3D shape

Question 11

what bonds hold the tertiary and quaternary bonds together?

Answer 11

hydrogen bonds

hydrophobic interactions

ionic bonds

disulphide bonds / bridges

Question 12

quaternary structure of a protein

Answer 12

only occurs in some proteins

when the protein is made of more than one polypeptide chain held together by bonds between the R groups

Question 13

What are conjugated proteins?

Answer 13

only occur in some proteins

contain another chemical group (prosthetic group) not made of amino acids.