
Concept explainers
Interpretation:
The effect of a permanent wave on structure of the protein must be explained. The amino acid that undergoes reaction during a permanent wave must be explained. The level of structure for the hair protein which gets affected needs to be explained.
Concept Introduction:
“Permanent wave” is a process in which hair shape can be changed to desired shape with the help of chemicals and heat.

Answer to Problem 22A
“Permanent wave” can change the structure of a protein by reduction and oxidation process.
Cysteine undergoes reaction during a permanent wave.
Tertiary structure of protein is affected during a “Permanent wave”.
Explanation of Solution
Natural disulfide (S-S) bonds in protein are broken first by reduction process in which free thiol groups (SH) are generated. Then hair I given desired shape by altering the tertiary structure due to chain shifting of protein. Finally to stabilize the new tertiary structure a final oxidation is performed in which new cysteine linkages (S-S) are formed.
The process is explained as follows:
Chapter 21 Solutions
World of Chemistry
- Indicate the products of the reaction of 2-(3-aminopropyl)cyclohexan-1-one with H2SO4. Draw the structures of the compounds.arrow_forwardIndicate the products of the reaction of 2-cyclopentyl-2-methyl-1,3-dioxolane with H3O+. Draw the structures of the compounds.arrow_forwardQuestion 4 For the molecule shown below, (7 marks): A) Sketch the Newman projection for the view looking along the bond from the perspective of the arrow. B) Then, draw the Newman projection for each 60° rotation along the bond until it returns to the starting point. C) Clearly indicate which Newman projection is the one we see in the structure shown below, and clearly indicate which Newman projection is the highest in energy and which is the lowest in energy. H H Me 'H Me Mearrow_forward
- Draw the major product of this reaction. Ignore inorganic byproducts and the amine side product. 'N' 1. NaOH, heat 2. Neutralizing work-up Select to Drawarrow_forwardSubmit Problem 3 of 10 Draw the major product of this reaction. Ignore inorganic byproducts and the amine side product. O 'N' NH 1. NaOH, heat 2. Neutralizing work-up Select to Drawarrow_forwardb) Certain cyclic compounds are known to be conformationally similar to carbohydrates, although they are not themselves carbohydrates. One example is Compound C shown below, which could be imagined as adopting four possible conformations. In reality, however, only one of these is particularly stable. Circle the conformation you expect to be the most stable, and provide an explanation to justify your choice. For your explanation to be both convincing and correct, it must contain not only words, but also "cartoon" orbital drawings contrasting the four structures. Compound C Possible conformations (circle one): Детarrow_forward
- Lab Data The distance entered is out of the expected range. Check your calculations and conversion factors. Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3? Did you report your data to the correct number of significant figures? - X Experimental Set-up HCI-NH3 NH3-HCI Longer Tube Time elapsed (min) 5 (exact) 5 (exact) Distance between cotton balls (cm) 24.30 24.40 Distance to cloud (cm) 9.70 14.16 Distance traveled by HCI (cm) 9.70 9.80 Distance traveled by NH3 (cm) 14.60 14.50 Diffusion rate of HCI (cm/hr) 116 118 Diffusion rate of NH3 (cm/hr) 175.2 175.2 How to measure distance and calculate ratearrow_forwardFor the titration of a divalent metal ion (M2+) with EDTA, the stoichiometry of the reaction is typically: 1:1 (one mole of EDTA per mole of metal ion) 2:1 (two moles of EDTA per mole of metal ion) 1:2 (one mole of EDTA per two moles of metal ion) None of the abovearrow_forwardPlease help me solve this reaction.arrow_forward
- Indicate the products obtained by mixing 2,2-dimethylpropanal with acetaldehyde and sodium ethoxide in ethanol.arrow_forwardSynthesize 2-Ethyl-3-methyloxirane from dimethyl(propyl)sulfonium iodide using the necessary organic or inorganic reagents. Draw the structures of the compounds.arrow_forwardSynthesize 2-Hydroxy-2-phenylacetonitrile from phenylmethanol using the necessary organic or inorganic reagents. Draw the structures of the compounds.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





