Essential Cell Biology, 4th Edition

Published by Garland Science
ISBN 10: 0815344546
ISBN 13: 978-0-81534-454-4

Chapter 2 - Chemical Components of Cells - Questions - Page 80: Question 2-16 A

Answer

a) $20^{2} = 400$ b) $20^{3} = 8000$ c) $20^{4} = 160000$

Work Step by Step

For each of the 2/3/4 components of a molecule made up of amino acids, we can choose from 20 options as there are 20 different types of amino acids out there. The options for a molecule composed of 2 amino acids are found by combining each unique amino acid with itself and the other 19 amino acids resulting in 400 options. For 3 components we've got 20 x 20 x 20 options and for 4 components 20 x 20 x 20 x 20.
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