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

What Is A Peptide Bond?

Answer 4

A bond, between amino acids.

Question 5

How Is A Peptide Bond Formed?
(5 Points)

Answer 5

~ Via a condensation reaction, releasing water.

~ A hydroxyl group (-OH), is lost from the carboxyl group of one amino acid.

~ A hydrogen atom, is lost from amine group of another.

~ Carbon atom bonds to the nitrogen atom, forming a peptide bond.

~ Forming dipeptides or polypeptides.

Question 6

How Are Peptide Bonds Broken?
(2 Points)

Answer 6

~ Via a hydrolysis reaction, adding a molecule of water.

~ The peptide bond breaks, causing amino acids to be released.

Question 7

How Are Dipeptides Formed?

Answer 7

By the condensation of two amino acids.

Question 8

How Are Polypeptides Formed?

Answer 8

By the condensation of two or more amino acids.