IGCSE Biology glossary
Eukaryote
Biology editorial review is supported by the named review panel. Reviewer participation may vary by guide. Checked against Cambridge IGCSE Biology 0610 (2026–2028); last reviewed August 2026.
Definition
An organism whose cells contain a true nucleus enclosed by a nuclear envelope, and membrane-bound organelles such as mitochondria and, in plants, chloroplasts. Animals, plants, fungi and protoctists are all eukaryotes.
What to include in an exam answer
In classification questions, being eukaryotic is a key feature that separates animals, plants, fungi and protoctists from bacteria. State 'true nucleus' and 'membrane-bound organelles'.
Example in context
State one feature that all eukaryotic cells have in common (1 mark): They all have a true nucleus enclosed by a nuclear envelope.
Related syllabus topic
Characteristics & classification of living organisms