EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
3rd Edition
ISBN: 9780133858501
Author: Bruice
Publisher: PEARSON CO
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Question
Chapter 17.3, Problem 3P
Interpretation Introduction
Interpretation:
The reason for insolubility of amino acids in diethyl ether unlike most of the
Concept introduction:
Polar compound soluble in polar solvents and non-polar compounds dissolves in non-polar solvents (like dissolves like).
Amino acids exist as zwitterion at certain
Zwitter ion: Zwitter ion has both positive as well as negative charge, thus it is also called neutral dipolar ion.
Zwitter ion accepts proton in acidic condition and in basic condition zwitter ion lose electrons.
Example: Zwitter ion
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Explain why amino acids, unlike most other organic compounds, are insoluble in organic solvents like diethyl ether.
What initiates a dehydration process between two amino acids, provided their carboxyl groups are exactly aligned with the amine groups of the other?
Amino acids can be synthesized by reductive amination.
Draw the structure of the organic compound that you would use to synthesize valine.
Chapter 17 Solutions
EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
Ch. 17.1 - a. Explain why, when the imidazole ring of...Ch. 17.2 - Prob. 2PCh. 17.3 - Prob. 3PCh. 17.3 - Prob. 4PCh. 17.3 - Prob. 6PCh. 17.4 - Calculate the pI of each of the following amino...Ch. 17.4 - a. Which amino acid has the lowest pI value? b....Ch. 17.5 - What aldehyde is formed when valine is treated...Ch. 17.5 - Prob. 10PCh. 17.5 - Prob. 11P
Ch. 17.5 - Prob. 12PCh. 17.6 - Prob. 13PCh. 17.6 - What amino acid would be formed using the...Ch. 17.6 - What amino acid would be formed when the aldehyde...Ch. 17.7 - Pig liver esterase is an enzyme that catalyzes the...Ch. 17.8 - Prob. 17PCh. 17.8 - Prob. 18PCh. 17.8 - Prob. 19PCh. 17.8 - Prob. 20PCh. 17.10 - Prob. 21PCh. 17.10 - Prob. 22PCh. 17.10 - Why does cyanogen bromide not cleave on the C-side...Ch. 17.10 - Prob. 24PCh. 17.10 - Prob. 26PCh. 17.12 - Prob. 27PCh. 17.13 - a. Which would have the greatest percentage of...Ch. 17 - Draw the predominant form of the following amino...Ch. 17 - What is the pI of serine?Ch. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Which would have a higher percentage of negative...Ch. 17 - Draw the form of aspartate that predominates at...Ch. 17 - Prob. 35PCh. 17 - A professor was preparing a manuscript for...Ch. 17 - a. Why is the pKa of the glutamate side chain...Ch. 17 - Prob. 38PCh. 17 - Determine the amino acid sequence of a polypeptide...Ch. 17 - Prob. 40PCh. 17 - Prob. 41PCh. 17 - Three peptides were obtained from a trypsin...Ch. 17 - Prob. 43PCh. 17 - After the polypeptide shown here was treated with...Ch. 17 - The disulfide bridges of a polypeptide were...Ch. 17 - -Amino acids can be prepared by treating an...Ch. 17 - Reaction of a polypeptide with carboxypeptidase A...Ch. 17 - Prob. 48PCh. 17 - Prob. 49PCh. 17 - Show how valine can be prepared by a. a Strecker...Ch. 17 - Prob. 51PCh. 17 - Why is proline never found in an -helix?Ch. 17 - Determine the amino acid sequence of a polypeptide...Ch. 17 - Prob. 55PCh. 17 - A chemist wanted to test his hypothesis that the...Ch. 17 - A normal polypeptide and a mutant of the...
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- Which of the following are true concerning the chemical bond that forms between the carboxyl (RCOOH) group of one amino acid and the amino (RCNH2) group of another? a.The bond is called a peptide bond. b.It is formed by inserting a water molecule between them. c.It is formed by a dehydration reaction. d.A polypeptide has more of these bonds than a protein.arrow_forwardGive at least 5 examples of biological compounds having an amide functional group and identify the biochemical importance of each compound.arrow_forwardCholesterol is reacted with acidified potassium dichromate. Determine the structure of the product formed and explain if further oxidation can occur.arrow_forward
- How is phenyl isothiocyanate useful in determining protein structure?arrow_forwardAmino acids can be synthesized by reductive amination. Draw the structure of the organic compound that you would use to synthesize alanine.arrow_forward1) To identify which contains more acid vinegar or lemon juice neutralization with sodium hydroxide can be used. Explain how. 2) The long filaments making up the thread of woven synthetic fabrics are likely polyesters. Describe the special characteristic that the alcohol and carboxylic acid must have so that they can react with each other to produce such long filaments.arrow_forward
- Give at least 5 examples of biological compounds having an amine functional group and identify the biochemical importance of each compound.arrow_forwardDefine phospholipids ? Why it is a major component of the cell membrane ?arrow_forwardDiscuss why are triacylglycerols, steroids, and phospholipids easily isolated using non-polar solvents.arrow_forward
- Explain why casein precipitates when vinegar is added. Why was milk or raw egg once used as an antidote in cases of heavy metal poisoning? Based on your isolated yield of casein, how many grams of the protein are in one 200 g glass of milk? Which of the solutions contained amide bonds? Which test tells you this? Which of the solutions contained compounds with primary amino groups? Which test tells you this? Describe two examples of protein folding patterns and identify what level of protein structure they belong to. What other reagents might you use besides ferric chloride to test affinity for metal ions?arrow_forward4. Write the two chemical equations that show the titration reactions of the carboxylic acid group and the protonated amino group of glycylglycine with sodium hydroxide.arrow_forwardIndicate whether each statement is true or false: Fat molecules contain amide bonds. Phospholipids can be zwitterions. Phospholipids form bilayers in water in order to have their long hydrophobic tails interact favourably with each other, leaving their polar heads to the aqueous environment.arrow_forward
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