IB Biology D2.2 Notes

This page contains our IB Biology notes for D2.2. By reading each one of these notes, you will fully cover the content for IB Biology 'Gene expression'.

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

Checking your access to read these notes...

Chapters

Loading progress...

Gene expression

This topic focuses on the concept of gene expression. Remember that this is the conversion of genes to proteins to express the gene's coded characteristics. In this, three terms are important to differentiate:

Genome - the collection of an organism's genes.
Transcriptome - the collection of an organism's transcribed genes.
Proteome - the collection of an organisms's proteins.

These may all seem equivalent, but this is not the case. Not all genes are transcribed, and not all proteins are produced from their transcribed genes. Thus, the end phenotype exhibited by a person only matches their proteome, not their transcriptome or genome. The changes from genome to proteome result from changes in gene expression. A person's patterns of gene expression is called their epigenome, whilst the study of epigenomes is called epigenetics.

tibertutor.com

Next Up

You have completed the sub-topic D2.2 notes, covering "Gene expression" for IB Biology - continue with related resources below or explore the full IB Biology course from the IBO.

Other Sub-topic D2.2 resources