Proteins

Question 1

How many amino acids are proteins made of?

Answer 1

20

Question 2

What is the primary structure of protein?

Answer 2

Sequence of amino acids coded by DNA. Amino acids are linked together by condensation reactions that form peptide bonds.

Question 3

What is the secondary structure of protein?

Answer 3

Hydrogen bonds between amino acids form an alpha helix or a beta pleated sheet.

Question 4

What is the tertiary structure of protein?

Answer 4

Hydrophobic reactions between the groups in the secondary structure create disulphide bridges and ionic bonds that form a specific folded structure.

Question 5

What is the quaternary structure of protein?

Answer 5

More than one polypeptide chain linked to form another molecule.

Question 6

What is an example of globular and fibrous proteins?

Answer 6

Globular - enzymes
Fibrous - keratin

Question 7

What is the structure of an amino acid?

Answer 7

Amino group, Variable (R) group, carboxylic group