Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 3, Problem 3.6PS
The “Permanent” Wave That Isn’t. The “permanent” wave that your local beauty parlor offers depends critically on rearrangements in the extensive disulfide bonds of keratin that give your hair its characteristic shape. To change the shape of your hair (that is, to give it a wave or curl), the beautician first treats your hair with a sulfhydryl reducing agent, then uses curlers or rollers to impose the desired artificial shape, and follows this by treatment with an oxidizing agent.
- (a) What is the chemical basis of a permanent? Be sure to include the use of a reducing agent and an oxidizing agent in your explanation.
- (b) Why do you suppose a “permanent” isn’t permanent? (Explain why the wave or curl is gradually lost during the weeks following your visit to the beautician.)
- (c) Can you suggest an explanation for naturally curly hair?
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Chapter 3 Solutions
Becker's World of the Cell (9th Edition)
Ch. 3 - What structural features of protein molecules...Ch. 3 - Prob. 3.1CCCh. 3 - Like proteins, nucleotides are important...Ch. 3 - Polysaccharides are also important macromolecules...Ch. 3 - Prob. 3.4CCCh. 3 - Polymers and Their Properties. For each of the six...Ch. 3 - Stability of Protein Structure. Several different...Ch. 3 - Prob. 3.3PSCh. 3 - Prob. 3.4PSCh. 3 - Hair Versus Silk. The a-keratin of human hair is a...
Ch. 3 - The Permanent Wave That Isnt. The permanent wave...Ch. 3 - Features of Nucleic Acids. For each of the...Ch. 3 - Wrong Again. For each of the following false...Ch. 3 - Prob. 3.9PSCh. 3 - Prob. 3.10PSCh. 3 - Telling Them Apart. For each of the following...Ch. 3 - Prob. 3.12PSCh. 3 - Prob. 3.13PSCh. 3 - QUANTITATIVE Thinking About Lipids. You should be...Ch. 3 - Shortening. A popular brand of shortening has a...
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