Biology 2010 Student Edition

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

Chapter 12, DNA - Assessment - 13.2 Ribosomes and Protein Synthesis - Understand Key Concepts/Think Critically - Page 386: 12

Answer

A codon is a group of three consecutive nitrogenous bases on the mRNA strand.

Work Step by Step

A codon is a group of three consecutive nitrogenous bases on the mRNA strand. There are four nitrogenous bases in mRNA: adenine, guanine, cytosine, and uracil. Each group of three bases or letters stands for either an amino acid, a start codon, or a stop codon.
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