IB Biology SL B1.2.2 Condensation Reactions Questions
Practise IB Biology SL B1.2.2 by tracing how the carboxyl and amine groups join to build peptide bonds and polypeptides at ribosomes.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Mark the peptide bond between C=O and N-H groups in a dipeptide or polypeptide diagram.
- Show condensation between amino acids, with peptide-bond formation and water release.
- Calculate peptide bonds from amino-acid totals and the number of separate polypeptide chains.
- Identify ribosomes as the site where amino acids are joined into polypeptide chains.
IB Biology SL B1.2.2 Condensation Reactions Questions question 1
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
Question (a)
(a)
The diagram shows a section of a polypeptide.
Question (i)
(i)
Annotate the diagram to show a peptide bond between two amino acids.
Question (ii)
(ii)
State the type of reaction that removes water while linking amino acids together to form polypeptides.
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