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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- structure of phosphatidylinositol that contains oleic acid and arachidonic acidarrow_forwardTrue or false. If false, changed the underlined words. Ceramides consist of a fatty acyl group linked to the C-2 amino group of sphingosine by an peptide bond. mRNA carries the activated amino acids to the ribosomes for incorporation into growing peptide chains during protein synthesis. Cholecalciferol is the active form of Vitamin D.arrow_forwardThe shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein. How can curls be induced?arrow_forward
- Protein folding with PDI and Peptidyl-prolyl isomerasearrow_forwardDifferences and similarties of ester and glycosidic linkage?arrow_forwardOne round of Edman degradation of the peptide: H2N- Gly-Arg-Lys- Phe-Asp- COOH which of the following structures would result when add cyanogen bromide ? A) H2N-Gly-Arg-COOH + H2N–Lys-Phe- Asp-COOH B) H2N-Arg-Lys-Phe-Asp-C0OH+ Gly C) H2N- Gly-Arg-Lys-Phe-Asp- COOH D) H2N-Gly-Arg-Lys-Phe-COOH + Asp E) H2N-Gly-Arg-Lys-COOH + H2N-Phe-Asp-COOHarrow_forward
- The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein. How can curls be induced? Explain chemically the basic steps (type of chemical and order) of what a hairstylist would use to treat the hair.arrow_forwardwool consists of alpha keratin, pure wool sweaters exposed to hot water shrink alarmingly, after shrinkage, it is virtually impossible to stretch the seweater back to its original shape, what do you think is the biochemical cause of this phenomenon?arrow_forwardWhy the monounsaturated and polyunsaturated lipids have higher nutritional value than saturated lipids.arrow_forward
- True or false? Cellulose microfibrils are bonded together with other polysaccharides hence providing resistance to compression.arrow_forwardWhat is the major biochemical function of each of the following proteins? α-Keratin _____________________________________ Collagen _____________________________________ Hemoglobin _____________________________________ Myoglobin _____________________________________arrow_forwardInteractions that make up the three-dimensional structure in proteins.arrow_forward
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