Amino Acids (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are the two essential functional groups present in all amino acids?
What are the two essential functional groups present in all amino acids?
Amine and carboxylic acid
Which amino acid is NOT chiral due to its R-group being a hydrogen atom?
Which amino acid is NOT chiral due to its R-group being a hydrogen atom?
Glycine
What is a zwitterion?
What is a zwitterion?
A dipolar ion with no net charge
In which form do amino acids exist at high pH?
In which form do amino acids exist at high pH?
Anionic form
What happens to the amine group of an amino acid at low pH?
What happens to the amine group of an amino acid at low pH?
It becomes protonated to
What is the isoelectric point (pI) of an amino acid?
What is the isoelectric point (pI) of an amino acid?
pH where it has no net charge
Why are amino acids described as amphoteric?
Why are amino acids described as amphoteric?
They can act as both acids and bases
Why do amino acids have high melting points?
Why do amino acids have high melting points?
They exist as ionic compounds
What is the solubility behaviour of amino acids?
What is the solubility behaviour of amino acids?
Soluble in water, not in non-polar
How many groups are bonded to the α-carbon in an amino acid?
How many groups are bonded to the α-carbon in an amino acid?
Four groups