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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 amino acid is unique because it lacks a chiral a-carbon and therefore is not optically active?
Which statement correctly explains why most amino acids (except glycine) are chiral?
Amino acids can act as buffers. Around which pH value does an amino acid buffer strongly?
Which statement about peptide bond geometry is correct?
Which feature distinguishes a primary, secondary, tertiary and quaternary protein structure?
Which two atoms form the peptide bond in a dipeptide?
Which of the following best describes formation of a peptide bond between two amino acids mechanistically?
Which description best fits the role of an amino acid side chain in determining protein function?
Which side chain property would make an amino acid more likely to be found in the interior of a folded protein (away from water)?
Which of the following changes would shift the equilibrium of an amino acid acid–base reaction (HA ? A- + H+) to the right (more dissociation)?
Peptide sequencing by mass spectrometry often uses enzymatic digestion (e.g., trypsin). What is the role of trypsin in protein analysis?