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A1.2 Nucleic acids Lessons - IB Biology

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A1.2 Nucleic acids

IB Biology Topic A1.2: Nucleic Acids Lessons

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Lessons for A1.2 Nucleic acids - IB

This lesson delivers structured, step-by-step lessons that guide students through every part of the IB Biology syllabus for A1.2 Nucleic acids. 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.

A1.2.1 DNA as the genetic material of all living organisms

A1.2.2 Components of a nucleotide

A1.2.3 Sugar–phosphate bonding and the sugar–phosphate “backbone” of DNA and RNA

A1.2.4 Bases in each nucleic acid that form the basis of a code

A1.2.5 RNA as a polymer formed by condensation of nucleotide monomers

A1.2.6 DNA as a double helix linked by hydrogen bonding between complementary base pairs

A1.2.7 Differences between DNA and RNA

A1.2.8 Complementary base pairing in allowing genetic information to be replicated and expressed

A1.2.9 Diversity of possible DNA base sequences and its capacity for storing information

A1.2.10 Conservation of the genetic code as evidence of universal common ancestry

A1.2.11 Directionality of RNA and DNA (HL only)

A1.2.12 Purine-to-pyrimidine bonding as a component of DNA helix stability (HL only)

A1.2.13 Structure of a nucleosome (HL only)

A1.2.14 Evidence from the Hershey–Chase experiment for DNA as the genetic material (HL only)

A1.2.15 Chargaff’s data on pyrimidine and purine bases across diverse life forms (HL only)

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