Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Chapter 23, Problem 50QAP
Interpretation Introduction
Interpretation:
The hydrolysis energy for formation of an amide bond when 1 mole of amino acid is added to the chain needs to be determined.
Concept introduction:
Amino acids combine to form protein, this results in the formation of a peptide bond between the protein chain and the coming amino acid. Bond is formed between the carbon and nitrogen atom; this is known as amide linkage.
Bond energy is the energy required for the formation or breaking the bond present between the atom of a molecule.
Hydrolysis for formation of an amide linkage can be determined as follows:
dH = BE (reactant) - BE (product)
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Proteins are formed when the
group of one amino acid
forms a peptide bond with the
group of a second amino
acid.
OR group; H-bond
+
O NH3*, R group
+
O -COO, NH3
-COO, R group
Chapter 23 Solutions
Chemistry: Principles and Reactions
Ch. 23 - Prob. 1QAPCh. 23 - Prob. 2QAPCh. 23 - Prob. 3QAPCh. 23 - Prob. 4QAPCh. 23 - Prob. 5QAPCh. 23 - Prob. 6QAPCh. 23 - Prob. 7QAPCh. 23 - Prob. 8QAPCh. 23 - Prob. 9QAPCh. 23 - Prob. 10QAP
Ch. 23 - Prob. 11QAPCh. 23 - Prob. 12QAPCh. 23 - Prob. 13QAPCh. 23 - Prob. 14QAPCh. 23 - Prob. 15QAPCh. 23 - Prob. 16QAPCh. 23 - Prob. 17QAPCh. 23 - Prob. 18QAPCh. 23 - Prob. 19QAPCh. 23 - Prob. 20QAPCh. 23 - How many chiral carbon atoms are there in ...Ch. 23 - How many chiral carbon atoms are there in sucrose?...Ch. 23 - Prob. 23QAPCh. 23 - Give the structural formulas of two different...Ch. 23 - (a) How many tripeptides can be made from glycine,...Ch. 23 - Prob. 26QAPCh. 23 - Prob. 27QAPCh. 23 - Prob. 28QAPCh. 23 - For alanine, Ka1=5.1105,Ka2=1.81010 . Calculate...Ch. 23 - Prob. 30QAPCh. 23 - On complete hydrolysis, a polypeptide gives two...Ch. 23 - Prob. 32QAPCh. 23 - Prob. 33QAPCh. 23 - Prob. 34QAPCh. 23 - Prob. 35QAPCh. 23 - Prob. 36QAPCh. 23 - Prob. 37QAPCh. 23 - Prob. 38QAPCh. 23 - Prob. 39QAPCh. 23 - Prob. 40QAPCh. 23 - Prob. 41QAPCh. 23 - Sketch the form in which leucine would exist in...Ch. 23 - How many tripeptides could one make from glycine,...Ch. 23 - A 1.00-mg sample of a pure protein yielded on...Ch. 23 - Describe what is meant by (a) the primary...Ch. 23 - Glycolysis is the process by which glucose is...Ch. 23 - Plants synthesize carbohydrates from CO2 and H2O...Ch. 23 - Prob. 48QAPCh. 23 - Prob. 49QAPCh. 23 - Prob. 50QAPCh. 23 - Prob. 51QAPCh. 23 - Aspartic acid acts as a triprotic acid with...
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- (a) How many tripeptides can be made from glycine, alanine, and leucine, using each amino acid only once per tripeptide? (b) Write the structural formulas of these tripeptides and name them in the shorthand abbreviation used for showing amino acid sequences.arrow_forwardWhat special role does the amino acid cysteine have in the peptides vasopressin and oxytocin?arrow_forwardDraw a segment of the backbone of a protein that is long enough for three peptide linkages to be present.arrow_forward
- (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_forward. How many unique amino acid sequences are possible for a tripeptide containing only the amino acids gly, ala, and cys, with each amino acid occurring only once in each molecule?arrow_forward9. The organic functional group in proteins that is formed as a result of individual amino acids linking together?arrow_forward
- question #59 pleasearrow_forwardAs we’ve discussed, a peptide bond is made when amino group of one amino acid combines with the carboxylic acid group of another amino acid (releasing a water molecule in the process). The C-N bond formed in this process is called a peptide bond. Peptide bonds have a few properties that might be unexpected. a) One property is that the molecular geometries around the C and N atom in the peptide bond are generally planar with bond angles of approximately 120 degrees. Provide an explanation for why the peptide bond would have this property, using Lewis structures, VSEPR theory and/or valence bond theory as appropriate.arrow_forward(a) Draw the chemical structure of a generic amino acid,using R for the side chain. (b) When amino acids react toform proteins, do they do so via substitution, addition,or condensation reactions? (c) Draw the bond that linksamino acids together in proteins. What is this called?arrow_forward
- 6. Is this amino acid L- or D-, and how can you tell? Н -ŅH3 CH3 a. D-, because all amino acids are D. b. D-, because the amine is on the right. c. D-, because the amine is on the left. d. L-, because the amine is on the left.arrow_forwardEach common amino acid has a specific letter that we use to represent it. For example, Lysine is represented by the letter K. What is that one letter that we use to represent Tryptophan? Only type one letter in the answer blank, and make sure it is capitalized.arrow_forwardCarbohydrates or sugars can be represented into two forms Fischer projections (open chain) or Haworth projections (ring structures). Let us identify the functional group present in carbohydrates Fischer projections of D-allose and D-fructose. H,C H-C-OH C=0 H-C-OH HO-C H-C-OH H-C-OH H C+OH H-C-OH HyC, HO. HO D-allose D-fructose a.) The functional group present in D-allose is b.) The functional group present in D-fructose is c.) The functional group common for D-allose and D-fructose isarrow_forward
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Biomolecules - Protein - Amino acids; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=ySNVPDHJ0ek;License: Standard YouTube License, CC-BY