Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 5, Problem 13RQ
Summary Introduction
To review:
The following amino acids either as polar ornonpolar, and eitheracidic or basic:
a. Glycine
b. Tyrosine
c. Glutamic acid
d. Histidine
e. Proline
f. Lysine
g. Cysteine
f. Aspargine
i. Valine
j. Leucine
Introduction:
An amino acid isa biologicalmicromoleculethat has two
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Question 25
Calculate the net charges of the following peptides at pH 7.4. Indicate which amino acids bear chuarged side chans
a) NH2-Asp-Leu-Phe-Ala-Lys-Pro-Glu-Gly-COOH
b) NH2-GIn-Glu-Lys-Tyr-Trp-Arg-Ala-Leu-COOH
DELL
A posttranslational modification that directs a polypeptide toa specific site is called a _____________________modification.
When a purine or pyrimidine is linked through a b-Nglycosidic link to C-1 of a pentose, the molecule is calleda _________________________.
Chapter 5 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 5 - Prob. 1QCh. 5 - Prob. 2QCh. 5 - Prob. 3QCh. 5 - Prob. 4QCh. 5 - Prob. 5QCh. 5 - Prob. 6QCh. 5 - Prob. 7QCh. 5 - Prob. 8QCh. 5 - Prob. 9QCh. 5 - Prob. 10Q
Ch. 5 - Prob. 11QCh. 5 - Prob. 12QCh. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 10RQCh. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Prob. 16RQCh. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - Prob. 19RQCh. 5 - Prob. 20RQCh. 5 - Prob. 21RQCh. 5 - Prob. 22RQCh. 5 - Prob. 23RQCh. 5 - Prob. 24RQCh. 5 - Prob. 25RQCh. 5 - Prob. 26RQCh. 5 - Prob. 27RQCh. 5 - Prob. 28RQCh. 5 - Prob. 29RQCh. 5 - Prob. 30RQCh. 5 - Prob. 31RQCh. 5 - Prob. 32FBCh. 5 - Prob. 33FBCh. 5 - Prob. 34FBCh. 5 - Prob. 35FBCh. 5 - Prob. 36FBCh. 5 - Prob. 37FBCh. 5 - Prob. 38FBCh. 5 - Prob. 39FBCh. 5 - Prob. 40FBCh. 5 - Prob. 41FBCh. 5 - Prob. 42SACh. 5 - Prob. 43SACh. 5 - Prob. 44SACh. 5 - Prob. 45SACh. 5 - Prob. 46SACh. 5 - Prob. 47TQCh. 5 - Prob. 48TQCh. 5 - Prob. 49TQCh. 5 - Prob. 50TQCh. 5 - Prob. 51TQCh. 5 - Prob. 52TQCh. 5 - Prob. 53TQCh. 5 - Prob. 54TQCh. 5 - Prob. 55TQCh. 5 - Prob. 56TQCh. 5 - Prob. 57TQCh. 5 - Prob. 58TQCh. 5 - Prob. 59TQCh. 5 - Prob. 60TQCh. 5 - Prob. 61TQCh. 5 - Prob. 62TQCh. 5 - Prob. 63TQCh. 5 - Prob. 64TQCh. 5 - Prob. 65TQCh. 5 - Prob. 66TQCh. 5 - Prob. 67TQCh. 5 - Prob. 68TQCh. 5 - Prob. 69TQCh. 5 - Prob. 70TQ
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- PKU is an abbreviation for what disorder? What are the symptoms of PKU? How can PKU be treated for a nearly normal life?arrow_forwardA posttranslational modification that directs a polypeptide to a specific location is called a _____________ modification.arrow_forwardWhen a purine or a pyrimidine is linked through a β-N-glycosidic link to C-1 of a pentose, the molecule is called a _____________ .arrow_forward
- The _____________ is an explanation for why there are fewer tRNAs than expected in living cells.arrow_forwardQuestion 18 There is energy requirement for every amino acid added in a growing polypeptide chain. A) True B) Falsearrow_forwardAdenine and guanine are examples of the_________________________ class of nitrogenous bases.arrow_forward
- Why can aldoses and ketoses both behave as reducing sugars?arrow_forwardQuestion 4. Imagine the main chain of a protein bends back on itself so that two amino acid residues R1 and R2 come close to each other. In the table below are four possibilities for what R1 and R2 might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. R₁ cysteine tyrosine threonine arginine R₂ cysteine phenylalanine glutamine aspartate specific interaction? OO yes O yes O no no OO O yes no yes no name of specific interaction 0 П 0 0arrow_forwardWhat is dimethylallyl pyrophosphate (DMPP)?arrow_forward
- What is the chemical nature of the enzyme primase?arrow_forwardThe figure below shows the titration curve for the amino acid aspartic acid. There are five key points in the titration designated with roman numerals. For each of the statements following the figure, identify the appropriate key point of the titrationarrow_forwardQuestion 11. // Hint: Isoelectric focusing separates proteins based on their pI values, and can separate proteins that only differ by a net charge of ±1.±1. Recall that an amino acid residue with a negatively charged R group has a relatively low isoelectric point (pI) where it has zero net charge. Likewise, an amino acid residue with a positively charged R group has a relatively high isoelectric point (pI) where it has zero net charge. Order from Low pH to High pHarrow_forward
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