Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 12, DNA - Standardized Test Prep - Page 359: 5



Work Step by Step

The backbone of the DNA molecule is made up of alternating sugar and phosphate groups. The rungs of the helix of DNA is made up of the nitrogenous base pairs of adenine-thymine and cytosine-guanine. Looking at the choices, we can determine that options A, C, and D are all incorrect. Only B is correct because it states that sugar and phosphates make up the backbone of the DNA helix.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.