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CAIE IGCSE Chemistry 11.8.13 & draw the structure of proteins as

CAIE IGCSE Chemistry 11.8.13 & draw the structure of proteins as
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise drawing protein chains by joining amino acid blocks with correctly oriented amide linkages and all bonds shown.

How this is tested

  • draw amide links between amino acid blocks with all atoms and bonds shown
  • choose the diagram that represents a protein chain with repeated CONH linkages

Question 6(c)(ii)

[Maximum number: 3]

Polymers are large molecules built up from small molecules.

Three amino acids are shown. They combine to form part of a natural polymer.

Figure for Question 6(c)(ii) — CAIE IGCSE Chemistry
Figure for Question 6(c)(ii) — CAIE IGCSE Chemistry
Figure for Question 6(c)(ii) — CAIE IGCSE Chemistry

Complete the diagram to show part of the structure of the natural polymer that forms when these three amino acids combine. Show all of the bonds in the linkages.

Figure for Question 6(c)(ii) — CAIE IGCSE Chemistry
Figure for Question 6(c)(ii) — CAIE IGCSE Chemistry
Figure for Question 6(c)(ii) — CAIE IGCSE Chemistry