B1.2 Proteins
Proteins connect amino acid structure, peptide-bond formation, dietary requirements, folding levels, R-group chemistry, denaturation, and functional protein shapes in cells.
- Syllabus
- First assessment 2025
- Topic
- B1.2
- Level
- SL
What you’ll learn
5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.
Exam analysis
An aggregate view of how the complete B1.2 Proteins appears across past papers.
Chance of appearing30%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper3
Most tested objectives
- B1.2.2—Condensation reactions11 questions
- B1.2.3—Dietary amino acids11 questions
- B1.2.12 (HL)—Globular vs. fibrous proteins9 questions
Common question formats
- Definition or recall
- Diagram interpretation
- Process explanation
- Structured response
- Comparison
- Data analysis
Exam question appearances
November 2025Paper2 ["SL"] · TZ12(a)[ 2 ]B1.2.3—Dietary amino acids
May 2025Paper1A ["SL"] · TZ34[ 1 ]B1.2.3—Dietary amino acids
May 2025Paper1A ["SL"] · TZ23[ 1 ]B1.2.2—Condensation reactions
November 2024Paper1 ["SL"] · TZ29[ 1 ]B1.2.2—Condensation reactions
November 2024Paper1 ["SL"] · TZ19[ 1 ]B1.2.2—Condensation reactions
Coverage 2010–2025 · Updated 15 Jul 2026