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AQA A-Level Biology – Proteins Exam Study Guide
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AQA A-Level Biology – Proteins Exam Study Guide
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AQA A-Level Biology – Proteins ExamStudy Guide
Amino Acid
A monomer that will join with other amino acids to form a
protein
Dipeptide
Two amino acids bonded together via a peptide bond
Polypeptide
Many amino acids bonded together via peptide bonds
Protein
A combination of polypeptides
Amine Group
-NH2, a basic group where the amino part of amino acid
comes from
Carboxyl Group
-COOH, an acidic group where the acid part of amino acid
comes from
, R Group
A side group that can be comprised of different chemical
groups
Condensation Reaction
The reaction that allows the formation of a peptide bond
Process of a Condensation Reaction
A H+ is removed from the amine group, and the OH- is
removed from the carboxyl group on the other amino acid.
This forms water and a dipeptide.
Primary Structure
The linear amino acid sequence of the polypeptide chain
Secondary Structure
The arrangement of the primary structure when
considering hydrogen bonds. This forms either an alpha
helix or a beta pleated sheet
Alpha Helix
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