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IB Biology SL B1.2.2 Condensation Reactions Questions

Practise IB Biology SL B1.2.2 by explaining how condensation joins amino acids into dipeptides and polypeptide chains.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify the peptide bond formed when the carboxyl group of one amino acid joins the amine group of another.
  • Explain that condensation releases water as amino acids join and forms a dipeptide or polypeptide chain with N- and C-termini.
  • Relate ribosomes to the ordered assembly of amino-acid chains during protein synthesis.

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Study B1.2.2—Condensation reactions conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL B1.2.2 Condensation Reactions Questions question 1

[Maximum number: 2]

A short base sequence of mRNA and a table of the genetic code are shown below.
Sequence of mRNA
AUGAGCCGAAGGUAGCUG
Table of the genetic code

Table for Question IB Biology SL B1.2.2 Condensation Reactions Questions question 1 — IB Biology SL

Question (a)

(a)

The diagram shows a section of a polypeptide.

Figure for Question (a) — IB Biology SL
[ 2 ]

Question (i)

(i)

Annotate the diagram to show a peptide bond between two amino acids.

[ 1 ]

Question (ii)

(ii)

State the type of reaction that removes water while linking amino acids together to form polypeptides.

[ 1 ]
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