Amino Acids (AQA A-Level Chemistry): Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Two functional groups in amino acids
Two functional groups in amino acids
Amine () and carboxylic acid () groups
Name of central carbon in amino acid
Name of central carbon in amino acid
α-carbon
Chirality of most amino acids
Chirality of most amino acids
Chiral - exist as two mirror-image forms (enantiomers)
Which amino acid is not chiral?
Which amino acid is not chiral?
Glycine (R group is hydrogen)
Definition of zwitterion
Definition of zwitterion
Dipolar ion with + and - charges but no net charge
Meaning of amphoteric
Meaning of amphoteric
Can react with both acids and bases
Definition of isoelectric point (pI)
Definition of isoelectric point (pI)
pH where amino acid exists as zwitterion (no net charge)
Form of amino acid at high pH
Form of amino acid at high pH
Anionic form
Form of amino acid at low pH
Form of amino acid at low pH
Cationic form
How many naturally occurring α-amino acids?
How many naturally occurring α-amino acids?
20
