Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Question
Chapter 3.1, Problem 4CC
Summary Introduction
To draw:
The structure where, from a cysteine molecule, the NH2 group is replaced with a COOH (carboxyl) group. Also, determine how this change would alter the chemical properties and state whether the central carbon atomis asymmetric after or before the alteration.
Concept introduction:
Amino acids are the molecules that are organic and consist of both the carboxyl and amino groups.
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Draw the structures of L-Cysteine from highly protonated to depronated form. Note Structure A as the most protonated form. Provide the charge of each structure.
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A
B
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The structural formula of erucic acid and behenic acid
с
H₂C
D
erucic acid
behenic acid
Which of the following best explains why erucic acid is liquid at room temperature but behenic acid is solid at
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O
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come polar and therefore packed more tightly.
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tightly together.
OH
The smaller number of carbon atoms in behenic acid creates stronger covalent bonds
between the carbon atoms allowing for them to pack more tightly together.
Consider the following Newman projection:
CH3
Br
CH3
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What word or two-word phrase describes this conformation?
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Chapter 3 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
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