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Amino Acids (ht Only) (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Amino Acids (ht Only)' from the broader topic Organic Chemistry. The test is geared towards the AQA exam board style syllabus.
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Which analytical method gives the molecular mass of an amino acid or peptide and is therefore useful to confirm sequence length?
Which statement about peptide bond geometry is correct?
Which process describes the hydrolysis of a polypeptide back to its constituent amino acids?
Which description best fits the role of an amino acid side chain in determining protein function?
Peptide sequencing by mass spectrometry often uses enzymatic digestion (e.g., trypsin). What is the role of trypsin in protein analysis?
Which analytical change would you expect when an amino acid sample is titrated, passing its isoelectric point pI?
Which amino acid is unique because it lacks a chiral a-carbon and therefore is not optically active?
Which of the following changes would shift the equilibrium of an amino acid acid–base reaction (HA ? A- + H+) to the right (more dissociation)?
Which property of amino acids allows them to act as both acids and bases (amphoteric behaviour)?
Which of the following best describes formation of a peptide bond between two amino acids mechanistically?
Which two atoms form the peptide bond in a dipeptide?