My Courses

DNA Structure

Edexcel GCSE Biology (1BI0) — Genetics

What You Need to Know

Describe DNA as a polymer made up of two strands coiled to form a double helix.
Describe how strands are linked by complementary base pairs joined by weak hydrogen bonds.
Describe the composition of nucleotides, consisting of a sugar, a phosphate group, and one of four different bases.

Edexcel GCSE Biology (1BI0) — Genetics

Describe DNA as a polymer made up of two strands coiled to form a double helix.
Describe how strands are linked by complementary base pairs joined by weak hydrogen bonds.
Describe the composition of nucleotides, consisting of a sugar, a phosphate group, and one of four different bases.