Answer
Correct option is (a)
Work Step by Step
It was discovered that genes are composed of DNA. Thus, the correct answer is option A.
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 12, DNA - Standardized Test Prep - Page 359: 4
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