Chemistry & Chemical Reactivity
9th Edition
ISBN: 9781133949640
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Textbook Question
Chapter 24, Problem 2PS
(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?
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(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?
All amino acids share a common
structure, a central (alpha) carbon
with four groups attached. Which
of these is NOT one of the four
groups attached to the alpha-
carbon?
O an R group
an ammonium group (-NH3+)
O a carboxylate group (-COO)
a hydronium group
Write the name of linkage joining two amino acids.
Chapter 24 Solutions
Chemistry & Chemical Reactivity
Ch. 24.1 - Draw the Lewis structure for the tripeptide...Ch. 24.1 - Prob. 1RCCh. 24.1 - Prob. 2RCCh. 24.1 - Prob. 3RCCh. 24.2 - Prob. 1RCCh. 24.2 - Prob. 2RCCh. 24.2 - Prob. 3RCCh. 24.3 - What is the sequence of the strand of DNA...Ch. 24.3 - Prob. 2CYUCh. 24.3 - 1. Which breaks down more quickly in an aqueous...
Ch. 24.3 - Prob. 2RCCh. 24.3 - 3. Which amino acid is selected by the mRNA codon...Ch. 24.3 - Kynamro has the hydrogen bonding sequence:...Ch. 24.3 - The formula of Kynamro is...Ch. 24.3 - Prob. 3QCh. 24.4 - 1. Which of the following is not an example of a...Ch. 24.4 - Prob. 2RCCh. 24.5 - Prob. 1RCCh. 24.5 - Prob. 2RCCh. 24.5 - Prob. 1QCh. 24.5 - Prob. 2QCh. 24.5 - Prob. 3QCh. 24 - (a) Draw the Lewis structure for the amino acid...Ch. 24 - (a) Draw the Lewis structure for the amino acid...Ch. 24 - Prob. 3PSCh. 24 - Prob. 4PSCh. 24 - Draw Lewis structures for the two dipeptides that...Ch. 24 - Do the amino acid sequences: valine-asparagine and...Ch. 24 - Draw the Lewis structure for the tripeptide...Ch. 24 - Prob. 8PSCh. 24 - Prob. 9PSCh. 24 - Prob. 10PSCh. 24 - Prob. 11PSCh. 24 - Prob. 12PSCh. 24 - (a) Draw the structural formula for the sugar...Ch. 24 - (a) Draw the structural formula for the sugar -D-2...Ch. 24 - Prob. 15PSCh. 24 - Prob. 16PSCh. 24 - Given the following nucleotide sequence in DNA:...Ch. 24 - Given the following nucleotide sequence in DNA: 5'...Ch. 24 - Prob. 19PSCh. 24 - If a drop of oleic acid is added to a dish of...Ch. 24 - What structure do all steroids have in common?Ch. 24 - Prob. 22PSCh. 24 - Prob. 23PSCh. 24 - The chemical equation for the fermentation of...Ch. 24 - Prob. 25PSCh. 24 - Prob. 26PSCh. 24 - Prob. 27GQCh. 24 - Prob. 28GQCh. 24 - Prob. 29GQCh. 24 - Prob. 30GQCh. 24 - Prob. 31GQCh. 24 - There are 41 = 4 mononucleotides of DNA, there are...Ch. 24 - Prob. 33GQCh. 24 - The first step of the metabolic process known as...Ch. 24 - Prob. 35ILCh. 24 - Insulin is a protein important in the metabolism...Ch. 24 - Prob. 37SCQCh. 24 - Prob. 38SCQCh. 24 - Do the DNA sequences ATGC and CGTA represent the...Ch. 24 - Prob. 41SCQCh. 24 - Which of the following statements is/are true? (a)...
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- (a) Provide four distinct forms of phenylalanine. (b) Rank the solubility of these forms in water. (c) Explain your ranking.arrow_forwardPart A: Condensed structural formulas (ionized) of amino acids -glycine -alanine -serine Part B: Write the structure of the ionized form of phenylalanine.arrow_forwardWhat initiates a dehydration process between two amino acids, provided their carboxyl groups are exactly aligned with the amine groups of the other?arrow_forward
- Indicate whether each statement is true or false: (a) Fat molecules contain amide bonds. (b) Phosphoplipids can be zwitterions. (c) Phospholipids form bilayers in water in order to have their long hydrophobic tails interact favorably with each other, leaving their polar heads to the aqueous environment.arrow_forwardSuppose a long-chain polypeptide is constructed entirely from phenylalanine monomer units. What is its empirical formula? How many amino acids does it contain if its molar mass is 17,500 g mol-1 ?arrow_forwardAmino acids containing a nonpolar "R" group, such as an alkyl or aromatic, are in nature. acidic O hydrophobic O hydrophilic O basicarrow_forward
- You are given the structures of the amino acids alanine (Ala), methionine (Met) and threonine (Thr). to H2N CO2H H2N CO2H H2N co,Harrow_forwardWhat is a free amino group? Draw the structure of the free amino grouparrow_forwardHow many atoms of each element are in a molecule of the amino acid lysine C6H14N3O2 ?arrow_forward
- Amino acids exist as dipolar ions or zwitterions in which the amino group exists as a negatively-charged ammonium group and the carboxyl group as a positively-charged carboxylate group. O True Falsearrow_forward(a) Why can’t two purine bases (A and G) form a base pair and hydrogen bond to each other on two strands of DNA in the double helix? (b) Why is hydrogen bonding between guanine and cytosine more favorable than hydrogen bonding between guanine and thymine?arrow_forwardDraw and name the type of bond that forms between amino and carboxyl groups in peptides.arrow_forward
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