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

2505 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Why are more cells produced as a result of Meiosis (compared with mitosis) but they contain fewer chromosomes?


What are the difference types of transport across membranes?


Explain the role of ADH in regulating the water potential of the blood.


Describe the passive movement through diffusion and explain Fick's Law


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