Describe the structure of DNA

-DNA is a double-stranded helix-Two polynucleotide strands (that run antiparallel to each other), held together by hydrogen bonding between the complementary base pairs-Each nucleotide consists of deoxyribose sugar, a phosphate group and a base (adenine [A), thymine [T], cytosine [C] and guanine [G] in the case of DNA).-The two strands are equidistant and the double helix is stable due to complementary base pairing, which means that A+T always pair together, and C+G always pair together

Answered by Biology tutor

2494 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Difference between prokaryote and eukaryote?


Explain the flow of ions during an action potential of a typical neurone


Describe the process of Oxidative Phosphorylation in the light dependent stage of photosynthesis


How are impulses propagated along an axon?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning