2.3.4 - Amino Acids & Peptide Bonds

Question 1

Describe Proteins
(2 Points)

Answer 1

~ Are polymers, made of monomers called amino acids.

~ The sequence, type and number of amino acids within a proteins determines its shape and therefore function.

Question 2

Describe Amino Acids
(2 Points)

Answer 2

~ Are the monomers of polypeptides.

~ All living things share a bank of 20 amino acids, the only difference between them is there carbon-containing R group.

Question 3

Describe Amino Acids Structure
(4 Points)

Answer 3

~ Amine (Amino) group, -NH2.

~ A carboxyl group, -COOH.

~ A hydrogen atom.

~ Carbon containing R group.

Question 4

Describe The Peptide Bond
(5 Points)

Answer 4

~ Form between amino acids.

~ A hydroxyl group (-OH) is lost from the carboxylic group of one amino acid and a hydrogen atom is lost from the amine group of another amino acid.

~ The remaining carbon atom from the first amino acid bonds to the nitrogen atom of the second amino acid.

~ This is a condensation reaction so water is released which could form polypeptides are dipeptides.

~ During hydrolysis, additions of water breaks the peptide bonds resulting in polypeptides being broken down to amino acids.

Question 5

How Are Dipeptides Formed?

Answer 5

By the condensation of two amino acids.

Question 6

How Are Polypeptides Formed?

Answer 6

By the condensation of two or more amino acids.