EBK ORGANIC CHEMISTRY
8th Edition
ISBN: 8220102744127
Author: Bruice
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 57P
What
a. tyrosine
b. leucine
c. arginine
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Chapter 21 Solutions
EBK ORGANIC CHEMISTRY
Ch. 21.1 - a. Explain why, when the imidazole ring of...Ch. 21.2 - a. Which isomer(R)-alanine or (S)-alanineis...Ch. 21.2 - Prob. 4PCh. 21.3 - Prob. 5PCh. 21.3 - Prob. 6PCh. 21.3 - Draw the predominant form for glutamate in a...Ch. 21.3 - a. Why is the pKa of the glutamate side chain...Ch. 21.4 - Calculate the pI of each of the following amino...Ch. 21.4 - a. Which amino acid has the lowest pI value? b....Ch. 21.4 - Prob. 12P
Ch. 21.4 - Prob. 13PCh. 21.4 - Explain why the pI of lysine is the average of the...Ch. 21.5 - What aldehyde is formed when valine is treated...Ch. 21.5 - Prob. 16PCh. 21.5 - Prob. 17PCh. 21.5 - Prob. 18PCh. 21.5 - Prob. 19PCh. 21.6 - Why is excess ammonia used in the preceding...Ch. 21.6 - Prob. 21PCh. 21.6 - What amino acid is formed using the...Ch. 21.6 - Prob. 23PCh. 21.6 - What amino acid is formed when the aldehyde used...Ch. 21.7 - Esterase is an enzyme that catalyzes the...Ch. 21.8 - Draw the tetrapeptide Ala-Thr-Asp-Asn and indicate...Ch. 21.8 - Draw the resonance contributors of the peptide...Ch. 21.8 - Which bonds in the backbone of a peptide can...Ch. 21.9 - An opioid pentapeptide has the following...Ch. 21.9 - What is the configuration about each of the...Ch. 21.9 - Glutathione is a tripeptide whose function is to...Ch. 21.10 - What dipeptides would be formed by heating a...Ch. 21.10 - Suppose you are trying to synthesize the dipeptide...Ch. 21.10 - Show the steps in the synthesis of the...Ch. 21.10 - a. Calculate the overall yield of bradykinin when...Ch. 21.11 - Show the steps in the synthesis of the...Ch. 21.13 - Prob. 37PCh. 21.13 - In determining the primary structure of insulin,...Ch. 21.13 - A decapeptide undergoes partial hydrolysis to give...Ch. 21.13 - Explain why cyanogen bromide does not cleave on...Ch. 21.13 - Indicate the peptides produced from cleavage by...Ch. 21.14 - Prob. 43PCh. 21.14 - Three peptides were obtained from a trypsin...Ch. 21.14 - Prob. 45PCh. 21.15 - How would a protein that resides in the nonpolar...Ch. 21.16 - a. Which would have the greatest percentage of...Ch. 21.17 - When apples that have been cut are exposed to...Ch. 21 - Glycine has pK2 values of 2.34 and 9.60. At what...Ch. 21 - Prob. 50PCh. 21 - A titration curve is a plot of the pH of a...Ch. 21 - Prob. 52PCh. 21 - Aspartame (its structure is on page 1007) has a pl...Ch. 21 - Draw the form of aspartate that predominates at...Ch. 21 - Show how phenylalanine can be prepared by...Ch. 21 - A professor was preparing a manuscript for...Ch. 21 - What aldehydes are formed when the following amino...Ch. 21 - Prob. 58PCh. 21 - Determine the amino acid sequence of a polypeptide...Ch. 21 - Prob. 60PCh. 21 - Prob. 61PCh. 21 - Which is the more effective buffer at...Ch. 21 - Identify the location and type of charge on the...Ch. 21 - Draw the product obtained when a lysine side chain...Ch. 21 - After the polypeptide shown below was treated with...Ch. 21 - Treatment of a polypeptide with 2-mercaptoethanol...Ch. 21 - Show how aspartame can be synthesized using DCCD.Ch. 21 - -Amino acids can be prepared by treating an...Ch. 21 - Reaction of a polypeptide with carboxypeptidase A...Ch. 21 - a. How many different octapeptides can be made...Ch. 21 - Glycine has pKa values of 2.3 and 9.6. Do you...Ch. 21 - A mixture of 15 amino acids gave the fingerprint...Ch. 21 - Write the mechanism for the reaction of an amino...Ch. 21 - Prob. 74PCh. 21 - Show how valine can be prepared by a. a...Ch. 21 - The primary structure of -endorphin, a peptide...Ch. 21 - A chemist wanted to test his hypothesis that the...Ch. 21 - Propose a mechanism for the rearrangement of the...Ch. 21 - A normal polypeptide and a mutant of the...Ch. 21 - Determine the amino acid sequence of a polypeptide...
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- What structure do all steroids have in common?arrow_forwardWhich 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_forwardThe plasmalogens are a group of lipids found in nerve and muscle cells. How do plasmalogens differ from fats?arrow_forward
- At room temperature, amino acids are solids with relatively high decomposition points. Explain why.arrow_forward1. A peptide that regulates the production of steroid hormones is a. vasopressin b. oxytocin C. adrenocorticotropic hormone (ACTH) od. glucagonarrow_forwardWhich amino acids on proteins can form glycosidic linkages? Select one: a. Cysteine and methionine b. Tryptophan and phenylalanine c. Glycine and proline d. Serine and asparagine e. Alanine and leucinearrow_forward
- which of the amino acids will make red litmus paper turn into blue when dissolved in water? a. proline b. alanine c. lysine d. glutamine which will have a positive result to biuret test? a. myosin b. caproic acid c. arginine d. 1-pentanolarrow_forwardrefer to the structure 1. This drug may likely bind to what protein? a. Alphaglycoprotein b. Bilirubin c. Albumin d. Globulin 2. What is the IUPAC name of this compound? a. Octanoic acid b. 2 – propylpentanoic acid c. 1 – butylbutanoic acid d. 2 – methylheptanoic acid 3. This drug may likely affects what neurotransmitter? a. Norepinephrine b. Gamma amino butyric acid c. Glutamate d. Dopamine 4. This drug affects what type of ion gated channel? a. Sodium b. Potassium c. Calcium d. Both A and B e. Both A and C f. Both B and C 5. This drug is a powerful a. Antiparkinsonism b. Anticonvulsant c. Antipsychotic d. Antidepressantarrow_forwardThe covalent bond that links two sugar monomers is known as a: A. Peptide bond B. Hydrogen bond C. glycosidic bond D. Phosphodiester bondarrow_forward
- Classify each statement as either true or false:a. Amino sugar contains an amino group in place of an hydroxy group.b. Sorbitol is an example of an alditol.c. The enzyme catalyzed oxidation of a hexose always occurs on the penultimate carbon.d. Hyaluronic acid is best known for its anticoagulant activity.arrow_forwardDraw the structure of each peptide. Label the N-terminal and C-terminal amino acids and all amide bonds. a. Val-Glu b. Gly-His-Leu c. M-A-T-Tarrow_forwardWhich intermolecular interaction is being disrupted when a protein is denatured using acids? a. Disulfide bonds b. Salt bridges c. Hydrogen bonds d. Hydrophobic reactionsarrow_forward
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