Q22 · 2024 · Paper 1Unclassified3 marks
QUESTION 22 (3 marks)
a) Describe the type of reaction that occurs when amino acid monomers are joined to form polypeptides.
[2 marks]
b) Identify the bond formed when amino acid monomers join to form a dipeptide.
[1 mark]
WORKED SOLUTION
3 marksQCAA guide · typeset solution
QCAA sample response and mark allocation
22a) | A condensation reaction occurs when amino acid monomers are joined to form a peptide bond and water is removed. | • identifies condensation reaction [1 mark] • describes that water is removed when the amino acids are joined to form polypeptides [1 mark] |
22b) | A peptide bond is formed. | • identifies peptide bond [1 mark] |
QCAA sample response and marking criteria reproduced from the official guide.
How many marks did you earn?
Compare your working with the guide above.