Proteins (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many naturally occurring amino acids are used to build proteins?
How many naturally occurring amino acids are used to build proteins?
20
What is eliminated when a peptide bond forms between two amino acids?
What is eliminated when a peptide bond forms between two amino acids?
A water molecule
What is the chemical structure of a peptide bond?
What is the chemical structure of a peptide bond?
What determines the primary structure of a protein?
What determines the primary structure of a protein?
DNA sequence
In secondary structure, what charge does the oxygen in groups carry?
In secondary structure, what charge does the oxygen in groups carry?
Slight negative charge
In an α-helix, hydrogen bonds form between amino acids how many positions apart?
In an α-helix, hydrogen bonds form between amino acids how many positions apart?
Four positions apart
Which bonds in tertiary structure are strong covalent bonds between cysteine amino acids?
Which bonds in tertiary structure are strong covalent bonds between cysteine amino acids?
Disulphide bridges
What can disrupt ionic bonds in tertiary protein structure?
What can disrupt ionic bonds in tertiary protein structure?
pH changes
What is quaternary structure?
What is quaternary structure?
Multiple polypeptide chains together
What prosthetic groups does haemoglobin contain?
What prosthetic groups does haemoglobin contain?
Iron-containing haem groups