Amino Acids & Polypeptides

Question 1

What are amino acids?

Answer 1

Monomers that made up proteins. 20 are found naturally in proteins.

Question 2

What is a buffer solution?

Answer 2

solution that can resist the tendency to alter their pH

Question 3

How is buffer solution important?

Answer 3

To keep the pH stable which is necessary for enzyme functioning

Question 4

Resulting bond from 2 amino acids is known as …

Answer 4

peptide bonds

Question 5

What is polymerisation?

Answer 5

process whereby through a series of condensation energy many amino acids monomers can be join together to form a polymer resulting change is called a polypeptide

Question 6

What is the 3D shape called?

Answer 6

alpha-helix or a folded sheet know as beta pleated sheet.

Question 7

What are the 4 structures of proteins?

Answer 7

Primary structure, secondary structure, tertiary structure and quaternary structure.

Question 8

The sequence in primary structure determines its properties and shape. Why?

Answer 8

The sequence of amino acids sets the pattern for additional bonding such as H-bonding between the amino acids and therefore how the chain is folded.

Question 9

Types of bonds that can be found in a polypeptide chain.

Answer 9

Disulphide bridges, ionic bond, h-bond, hydrophobic interactions between electrons groups of non-polar molecule

Question 10

How is the polypeptide chain structure like?

Answer 10

Most often they are bend/fold to an alpha helix (form of of spiral spring) eg. protein keratin.