QCEVault

Polymers and biomolecules — Question 25

Original QCE Vault practice · 1 mark

Q25 · Practice questionSimple familiar1 mark

QUESTION 25

A tripeptide is formed from three amino-acid molecules. How many peptide bonds and water molecules are formed?
(A)
1 bond, 1 water
(B)
2 bonds, 2 waters
(C)
3 bonds, 2 waters
(D)
3 bonds, 3 waters
Question linkSyllabus coverage

Related questions

  1. Q9 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 9 Which protein structure contains two or more protein chains bonded together to form subunits? (A) primary (B) secondary (C) tertiary (D) quaternary
    Polymers and biomolecules
  2. Q13 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 13 Which monosaccharide undergoes a condensation reaction with glucose to form sucrose? (A) galactose (B) fructose (C) glucose (D) maltose
    Polymers and biomolecules
  3. Q4 · 2024 QCAA · Paper 1 · 1 mark
    QUESTION 4 Identify which polymer contains a carbonyl (C= O) group. (A) polyester (B) polyethene (C) polypropene (D) polytetrafluorethene
    Polymers and biomolecules
  4. Q9 · 2024 QCAA · Paper 1 · 1 mark
    QUESTION 9 Polytetrafluorethene (PTFE) has a higher melting point than polypropene (PP) due to the (A) C– F bonds being non-reactive. (B) fluorine atoms forming stable C– F covalent bonds. (C) dispersion forces between closely packed fluorocarbon chains. (D) dipole–dipole interaction between fluorine and carbon atoms within the fluorocarbon chain.
    Polymers and biomolecules