IB Biology B2.2 Definitions

This page contains our IB Biology definitions for B2.2. By learning each one of these definitions, you will fully cover the content for IB Biology 'Organelles & compartmentalisation'.

All Topic 2 Sub-topics (HL)A2.1: Origins of cells A2.2: Cell Structure (HL)A2.2: Further cell structure (HL)A2.3: Viruses B2.1: Membranes And Transport (HL)B2.1: Further membranes and transport B2.2: Organelles & Compartmentalisation (HL)B2.2: Further organelles B2.3: Cell Specialisation (HL)B2.3: Further cell specialisation (HL)C2.1: Chemical signalling C2.2: Neural Signalling (HL)C2.2: Further neural signalling D2.1: Cell Division (HL)D2.1: Cell cycle (HL)D2.2: Gene expression D2.3: Water Potential (HL)D2.3: Further water potential

eukaryote

A multicellular organism with complex cell structure and compartmentalization

hypertonic

A solution with a higher solute concentration than another solution

mutation

A random change to the base sequence of a gene

osmosis

The movement of water from a region of low solute concentration to a region of high solute concentration, across a partially permeable cell membrane

post-transcriptional modification

The process of splicing exons and removing introns from an mRNA strand after transcription to form mature mRNA for translation

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