Chemistry In Focus
6th Edition
ISBN: 9781305084476
Author: Tro, Nivaldo J., Neu, Don.
Publisher: Cengage Learning
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Chapter 15, Problem 47E
The salt bridges that hold hair protein (keratin) strands together rely on
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Examine the structure of the following amino acid and answer the questions below:
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Chapter 15 Solutions
Chemistry In Focus
Ch. 15 - Prob. 15.1YTCh. 15 - Prob. 1SCCh. 15 - Prob. 2SCCh. 15 - Prob. 3SCCh. 15 - Prob. 1ECh. 15 - Prob. 2ECh. 15 - Prob. 3ECh. 15 - Prob. 4ECh. 15 - Prob. 5ECh. 15 - Prob. 6E
Ch. 15 - Prob. 7ECh. 15 - Prob. 8ECh. 15 - Prob. 9ECh. 15 - Prob. 10ECh. 15 - Prob. 11ECh. 15 - Prob. 12ECh. 15 - Prob. 13ECh. 15 - Define eutrophication.Ch. 15 - Prob. 15ECh. 15 - Prob. 16ECh. 15 - Prob. 17ECh. 15 - Prob. 18ECh. 15 - Prob. 19ECh. 15 - What are the three types of interactions that...Ch. 15 - Prob. 21ECh. 15 - Prob. 22ECh. 15 - Prob. 23ECh. 15 - Prob. 24ECh. 15 - Prob. 25ECh. 15 - Prob. 26ECh. 15 - Prob. 27ECh. 15 - Prob. 28ECh. 15 - Prob. 29ECh. 15 - How do sunscreens protect your skin from the Suns...Ch. 15 - Prob. 31ECh. 15 - Prob. 32ECh. 15 - Prob. 33ECh. 15 - Prob. 34ECh. 15 - Prob. 35ECh. 15 - Prob. 36ECh. 15 - Prob. 37ECh. 15 - Prob. 38ECh. 15 - Prob. 39ECh. 15 - Prob. 40ECh. 15 - Prob. 41ECh. 15 - Prob. 42ECh. 15 - Prob. 43ECh. 15 - Prob. 44ECh. 15 - Prob. 45ECh. 15 - Prob. 46ECh. 15 - The salt bridges that hold hair protein (keratin)...Ch. 15 - Prob. 48ECh. 15 - The hydrochloric acid present in toilet bowl...Ch. 15 - Prob. 50ECh. 15 - Prob. 51ECh. 15 - Prob. 52ECh. 15 - Prob. 53ECh. 15 - Prob. 54ECh. 15 - Prob. 55ECh. 15 - Prob. 56ECh. 15 - Prob. 57ECh. 15 - Prob. 58ECh. 15 - Prob. 59ECh. 15 - Prob. 60ECh. 15 - Prob. 61ECh. 15 - Prob. 62ECh. 15 - Prob. 64ECh. 15 - Prob. 65E
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- (a) Draw the Lewis structure for the amino acid phenylalanine, showing the amino group and the carboxylic group in their un-ionized forms. (b) Draw the Lewis structure for the zwitterionic form of phenylalanine. (c) Which of these structures will be the predominant form at physiological pH?arrow_forwardThe protein neuroglobin has a heme group associated with it. It is an example of a Ο Ο Ο Ο Ο Ο lipoprotein nucleoprotein glycoprotein phosphoprotein O metalloprotein Ⓒhemoproteinarrow_forward2. In the space provided, draw the structure of valine (val) at each of the following pH values. Valine has a pl of 5.97. CH₁ CH-CH, H₂N-C-COOH H a) pH = 4.34 Valine (Val) b) pH = 5.97arrow_forward
- Would Na2CO3 react with HCl? Write the chemical equation. Write the chemical equation for the reaction of NaHCO3 with HCl.arrow_forwardCalculate the molecular weight of a small protein if 5.90 g sample of this protein is dissolved in H₂O to make 563 mL of solution which has an osmotic pressure of 14.2 torr at 25°C. a) 1.53 x 10³ g/mol b) 1.37 x 104 g/mol e) 5.81 x 105 g/mol f) 9.74 x 106 g/mol g) 3.37 x 102 g/mol c) 7.23 x 10³ g/mol d) 3.54 x 105 g/molarrow_forwardQ1. The pKa values of Glutamic acid are 2.2, 4.3 and 9.7. H2N но. HO (a) Calculate the pH of a glutamic acid solution in which the a-amine group is 80% deprotonated? (show your calculation!) (b) Draw the ionic forms of glutamic acid that exist at the calculated pH.arrow_forward
- H2PO4- is amphiprotic and can act as a Brønsted-Lowry acid or Brønsted-Lowry base. Write the chemical equations demonstrating how this can be true.arrow_forwardTyrosine is an amino acid. Which atoms in this molecule can form hydrogen bonds?arrow_forward22-53 Do iron and zinc ions play role in protein structure? If so, what is the role for either or both?arrow_forward
- 21-101 Glycerophospholipids tend to have both a positive charge and a negative charge in their hydrophilic portions. Does this fact help or hinder lipid packing in membranes? Explain.arrow_forward22-45 Proteins are least soluble at their isoelectric points. What would happen to a protein precipitated at its isoelectric point if a few drops of dilute HCl were added?arrow_forward22-49 Based on your knowledge of the chemical properties of amino acid side chains, suggest a substitution for leucine in the primary structure of a protein that would probably not change the character of the protein very much.arrow_forward
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