B1.2.4—Infinite variety of peptide chains
Protein diversity arises because amino acids can be linked in enormous numbers of different orders and chain lengths through translation.
- Syllabus
- First assessment 2025
- Objective
- B1.2.4
- Level
- SL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceMay 2021
Most common paperPaper2
Typical marks7
Common command terms
- Explain
- Describe
Recent exam appearances
May 2021Paper2 ["SL"] · TZ16(b)[ 7 ]B1.2.4—Infinite variety of peptide chains
Practice this objective
Coverage 2021–2021 · Updated 15 Jul 2026
Concept essentials
- Protein primary structure depends on amino-acid number, type and order.
- Genes encode polypeptide sequences through transcription and translation.
- Different R-groups give amino acids different chemical properties.
- Many possible amino-acid sequences create a huge variety of proteins.