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A1.1 Water

A1.2 Nucleic acids

A2.1 Origins of cells (HL)

A2.2 Cell structure

A2.3 Viruses (HL)

A3.1 Diversity of organisms

A3.2 Classification and cladistics (HL)

A4.1 Evolution and speciation

A4.2 Conservation of biodiversity

B1.1 Carbohydrates and lipids

B1.2 Proteins

B2.1 Membranes and membrane transport

B2.2 Organelles and compartmentalization

B2.3 Cell specialization

B3.1 Gas exchange

B3.2 Transport

B3.3 Muscle and motility (HL)

B4.1 Adaptation to environment

B4.2 Ecological niches

C1.1 Enzymes and metabolism

C1.2 Cell respiration

C1.3 Photosynthesis

C2.1 Chemical signalling (HL)

C2.2 Neural signalling

C3.1 Integration of body systems

C3.2 Defense against disease

C4.1 Populations and communities

C4.2 Transfer of energy and matter

D1.1 DNA replication

D1.2 Protein synthesis

D1.3 Mutations and gene editing

D2.1 Cell and nuclear division

D2.2 Gene expression (HL)

D2.3 Water potential

D3.1 Reproduction

D3.2 Inheritance

D3.3 Homeostasis

D4.1 Natural selection

D4.2 Sustainability and change

D4.3 Climate change

IB Biology Topic D1.2: Protein Synthesis Lessons

Written by IB Experts

This lesson delivers structured, step-by-step lessons that guide students through every part of the IB Biology syllabus for D1.2 Protein synthesis. These lessons simplify complex ideas like molecular biology, evolutionary mechanisms, and homeostasis, while worked examples show how to approach IB-style questions.

Designed for both HL and SL learners, RevisionDojo lessons ensure students not only understand the theory but also know how to apply it in IB Paper exam situations.

With clear explanations, active learning checks, and a syllabus-first design, RevisionDojo makes revision less overwhelming and more effective.

D1.2.1 Transcription as the synthesis of RNA using a DNA template

D1.2.2 Role of hydrogen bonding and complementary base pairing in transcription

D1.2.3 Stability of DNA templates

D1.2.4 Transcription as a process required for the expression of genes

D1.2.5 Translation as the synthesis of polypeptides from mRNA

D1.2.6 Roles of mRNA, ribosomes and tRNA in translation

D1.2.7 Complementary base pairing between tRNA and mRNA

D1.2.8 Features of the genetic code

D1.2.9 Using the genetic code expressed as a table of mRNA codons

D1.2.10 Stepwise movement of the ribosome along mRNA

D1.2.11 Mutations that change protein structure

D1.2.12 Directionality of transcription and translation (HL)

D1.2.13 Initiation of transcription at the promoter (HL)

D1.2.14 Non-coding sequences in DNA do not code for polypeptides (HL)

D1.2.15 Post-transcriptional modification in eukaryotic cells (HL)

D1.2.16 Alternative splicing of exons to produce variants of a protein from a single gene (HL)

D1.2.17 Initiation of translation (HL)

D1.2.18 Modification of polypeptides into their functional state (HL)

D1.2.19 Recycling of amino acids by proteasomes (HL)

IB Biology Topic D1.2: Protein Synthesis Lessons

A - Unity and Diversity

B - Form and Function

C - Interaction and Interdependence

D - Continuity and Change

A - Unity and Diversity

B - Form and Function

C - Interaction and Interdependence

D - Continuity and Change

IB Biology Topic D1.2: Protein Synthesis Lessons

Lessons for D1.2 Protein synthesis - IB

IB Biology Topic D1.2: Protein Synthesis Lessons