Campbell Biology (10th Edition)
Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 4.3, Problem 3CC

DRAW IT Ø Suggose you had an organic molecule such as cysteine (see Figure 4.9, sulfhydryl group example), and you chemically removed the —NH2 group and replaced it with —COOH. Draw this structure. How would this change the chemical properties of the molecule? Is the central carbon asymmetric before the change? After?

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Following is a structural formula for the amino acid cysteine: 11 HS-CH₂-CH-C-OH NH₂ Name the three functional groups in cysteine. a. What is the name of the highlighted functional group? HS-CH₂-CH-C-OH NH₂ O carboxyl group O amino group O thiol group O disulfide group What is the name of the highlighted functional group? O HS-CH₂-CH-C-OH NH₂ O carboxyl group O amino group O thiol group O disulfide group Previous Next
Draw all three staggered conformations for the following compound, viewed along the C₂-C3 bond. Determine which conformation is the most stable, taking into account gauche interactions and hydrogen-bonding interactions. (J. Phys. Chem. A 2001, 105, 6991-6997) Provide a reason for your choice by identifying all of the interactions that led to your decision. H H&COH C₂ C3 HỌ CH CH3 Which of the following is the most stable staggered conformer? Me H OH Me OH Me- Me Me H Conformer A OH OH OH HO H H H Conformer B Conformer C Me Conformer B because the anti OH groups avoid hydrogen bonding, which is a destabilizing effect. Conformer A because there are only two gauche interactions, and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer C because there is no steric strain for Me-OH gauche interactions and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer B because the large OH groups are anti to each other.
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.  (Answer structure C and D pls)
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Macromolecules | Classes and Functions; Author: 2 Minute Classroom;https://www.youtube.com/watch?v=V5hhrDFo8Vk;License: Standard youtube license