Gene Expression - GCSE Biology Definition

Reviewed by: Lára Marie McIvor

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Gene expression is the process by which information from a gene is used by a cell to make a specific protein. Think of it like a recipe in a cookbook - the gene contains the instructions that tell the cell how to create proteins, which are important molecules that perform various functions in the body. When a gene is expressed, it means the cell is "reading" the instructions to produce the protein. This is crucial because proteins help control important activities, like growth and repairing tissues. Gene expression can be turned on or off depending on what the cell or organism needs at any given time.

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Lára Marie McIvor

Reviewer: Lára Marie McIvor

Expertise: Biology, Psychology & Sociology Subject Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.

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