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Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
8th Edition
ISBN: 9780134015187
Author: John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher: PEARSON
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Chapter 27, Problem 27.21AP
Interpretation Introduction
Interpretation:
The primary purpose of telomeres has to be explained.
Concept introduction:
Telomeres: They are the compound structure seen in the end of the chromosome.
Telomeres of human consist of long repetitive series of
Telomeres are covers present at the end which protect the chromosome ends from damaging it accidently. It also prevents the ends of DNA from fusing together with DNA of another chromosome.
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Students have asked these similar questions
From the reaction data below, determine whether the reaction is first order or second order and calculate the rate constant.
Time (s)
0
Reactant (mM)
5.4
1
4.6
2
3.9
3
3.2
4
2.7
5
2.3
Only a plot of In[reactant] versus t gives a straight line, so the reaction is
first order
. The negative of the slope, k, is
0.171
Hair grows at a rate of about 20 cm/yr. All this growth is concentrated at the base of the hair fiber, where a-keratin filaments are
synthesized inside living epidermal cells and assembled into ropelike structures.
Two-chan
14
Protofilament
20-30 A
Two-chain
Intermediate
flament
-Protob
Protofilament
Cross section of a hair
The fundamental structural element of a keratin is the a helix, which has 3.6 amino acid residues per turn and a rise of 5.4 A
perlum.
54A
(36)
Amino terminus
Carbon
Hydrogen
Oxygen
Nitrogen
group
Carboxyl terminus
Assuming that the biosynthesis of a helical keratin chains is the rate-limiting factor in the growth of hair, calculate the rate at
which peptide bonds of a-keratin chains must be synthesized (peptide bonds per second) to account for the observed yearly
growth of hair.
0422
rate of peptide bond formation:
Income
bonds/s
Specific rotation is a measure of a solution's capacity to rotate circularly polarized light. The unfolding of the a helix of a
polypeptide to a random conformation is accompanied by a large decrease in specific rotation.
Polyglutamate, a polypeptide made up of only 1-Glu residues, has the a helix conformation at pH 3. When researchers raise the
pH to 7, there is a large decrease in the specific rotation of the solution. Similarly, polylysine (1.-Lys residues) is an a helix at pH
10, but when researchers lower the pH to 7 the specific rotation also decreases, as shown in the graph.
a Helix
Specific rotation
Poly(Glu)
a Helix
Random
conformation
Poly(Lys)
Random conformation
T
+
°
2
4
6 В
10 12 14
PH
Complete the statements about the molecular mechanism for these changes in specific rotation.
Increasing the pH of a polyglutamate solution from 6 to 7 causes the carboxyl group of each glutamate residue
Comed Artwer
lose a proton. The negatively charged groups in each glutamate residue…
Chapter 27 Solutions
Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
Ch. 27.1 - Decode the following sequence of letters to find...Ch. 27.3 - Prob. 27.1CIAPCh. 27.3 - Prob. 27.2CIAPCh. 27.3 - Prob. 27.3CIAPCh. 27.3 - Prob. 27.2KCPCh. 27.4 - Prob. 27.3PCh. 27.4 - A restriction enzyme known as EcoRI cuts DNA in...Ch. 27.4 - Prob. 27.5PCh. 27.5 - Classify the following activities according to the...Ch. 27.5 - Prob. 27.4CIAP
Ch. 27.5 - Prob. 27.5CIAPCh. 27.5 - Prob. 27.6CIAPCh. 27 - What steps are necessary in the mapping of the...Ch. 27 - Prob. 27.8UKCCh. 27 - List the four types of noncoding DNA (see Section...Ch. 27 - In general, what are the differences between...Ch. 27 - What is recombinant DNA? How can it be used to...Ch. 27 - Identify some major potential benefits of the...Ch. 27 - Prob. 27.13APCh. 27 - Prob. 27.14APCh. 27 - Prob. 27.15APCh. 27 - Prob. 27.16APCh. 27 - Prob. 27.17APCh. 27 - Prob. 27.18APCh. 27 - Prob. 27.19APCh. 27 - You may have heard of Dolly, the cloned sheep...Ch. 27 - Prob. 27.21APCh. 27 - Prob. 27.22APCh. 27 - What is the role of the enzyme telomerase? In what...Ch. 27 - Prob. 27.24APCh. 27 - Prob. 27.25APCh. 27 - Prob. 27.26APCh. 27 - Prob. 27.27APCh. 27 - What is a SNP?Ch. 27 - How are SNPs linked to traits in individual human...Ch. 27 - List some potential biological effects of SNPs.Ch. 27 - Prob. 27.31APCh. 27 - Prob. 27.32APCh. 27 - Prob. 27.33APCh. 27 - Prob. 27.34APCh. 27 - Prob. 27.35APCh. 27 - Prob. 27.36APCh. 27 - Prob. 27.37APCh. 27 - Prob. 27.38APCh. 27 - In the formation of recombinant DNA. a restriction...Ch. 27 - Give the sequence of unpaired bases that would be...Ch. 27 - Are the following base sequences sticky or not...Ch. 27 - Prob. 27.42APCh. 27 - Prob. 27.43APCh. 27 - Provide two examples of genetically engineered...Ch. 27 - Prob. 27.45APCh. 27 - Why is the field of bioethics so important in...Ch. 27 - Prob. 27.47CPCh. 27 - Prob. 27.48CPCh. 27 - Prob. 27.49CPCh. 27 - Prob. 27.50CPCh. 27 - What is a restriction endonuclease?Ch. 27 - Prob. 27.52CPCh. 27 - Prob. 27.53GPCh. 27 - One of the most actively pursued areas in genomics...Ch. 27 - Prob. 27.55GP
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- From the reaction data below, determine whether the reaction is first order or second order and calculate the rate constant. Time (s) 0 Reactant (mM) 6.2 1 3.1 2 2.1 3 1.6 4 1.3 5 1.1 Only a plot of 1/[reactant] versus t gives a straight line, so the reaction is 0.150 mM-1 s-1 . S second order . The slope, k, isarrow_forwardFrom the reaction data below, determine whether the reaction is first order or second order and calculate the rate constant. Time (s) 0 Reactant (mM) 5.4 1 4.6 2 3.9 3 3.2 4 2.7 5 2.3 Only a plot of In[reactant] versus t gives a straight line, so the reaction is s-1. . The negative of the slope, k, isarrow_forwardA protein has a molecular mass of 400 kDa when measured by size-exclusion chromatography. When subjected to gel electrophoresis in the presence of sodium dodecyl sulfate (SDS), the protein gives three bands with molecular masses of 180, 160, and 60 kDa. When electrophoresis is carried out in the presence of SDS and dithiothreitol (DTT), three bands again form, this time with molecular masses of 160, 90, and 60 kDa. How many subunits does the protein have, and what is the molecular mass of each? four subunits: 180, 160, 90, and 60 kDa three subunits: 180, 160, and 60 kDa three subunits: 160, 90, and 60 kDa four subunits: 160, 90, 90, and 60 kDa Correct Answerarrow_forward
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