Skip to content

Home
Subjects
Past Papers
Key Terms

My Courses

Select your courses

Subjects

History
Geography
Biology
Chemistry
Physics
Mathematics

Resources

Browse Courses
Past Papers
Key Terms & Definitions
Pricing

About

Sign Up
Log In
Privacy Policy
Terms of Service

© 2026 GradeGen.AI

Not affiliated with any exam board.

Cytosine (C) — Edexcel Biology Definition | GradeGen.AI

Courses
Biology
Key Terms
Cytosine (C)

GCSEEdexcel1BI0

Cytosine (C)

Key term for Edexcel GCSE Biology, used in Reproduction and DNA.

Definition

A nitrogenous base that always pairs with Guanine.

Exam Context

Cytosine (C) appears in Edexcel GCSE Biology revision content for Genetics, especially Reproduction and DNA and DNA Structure.

Genetics Reproduction and DNA DNA Structure

Found in Revision Notes

Genetics

DNA Structure

Reproduction and DNA • DNA Structure

Related Key Terms

Adenine (A)Antiparallel Complementary base pairing Deoxyribose sugar

Revise Biology with GradeGen.AI

Create a free account to access Edexcel GCSE Biology revision notes, track progress, and practise related key terms.

Sign Up to Start Revising Log In

DNA (Deoxyribonucleic Acid)