The peptide bond

Question 1

What is a peptide bond?

Answer 1

1)The peptide bond is a covalent bond formed between an amino group from one amino acid and a carbonyl group from another amino acid

2)During peptide bond formation, water is released (condensation reaction)

Question 2

General characeristics

Answer 2

1)It is a covalent bond

2)It consists of O, C, N and H atoms

Question 3

Properties

Answer 3

1)It is flat or planar

2)Has double bond characteristics
-It is rigid. The bond cannot rotate freely around the C-N bond

3)It is polar. It can form hydrogen bonds with another peptide bond

Question 4

Peptide

Answer 4

A chain of amino acids joined by peptide bonds

-Different amino acids may form peptide bonds and link up to form a sequence of amino acids residues

Question 5

Oligopeptide

Answer 5

A short chain of amino acids (typically 2-20)

Question 6

Polypeptide

Answer 6

A long chain of amino acids (typically more than 20)

Question 7

Protein

Answer 7

One or more polypeptide chains that fold and form a 3-D structure