Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Textbook Question
Chapter 25, Problem 25.22P
25-22 In DNA, which carbon atoms of 2-deoxy-D-ribose are
bonded to the phosphate groups?
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(28 pts.) 7. Propose a synthesis for each of the following transformations. You must include the
reagents and product(s) for each step to receive full credit. The number of steps is provided.
(OC 4)
4 steps
4 steps
OH
b.
LTS
Solid:
AT=Te-Ti
Trial 1
Trial 2
Trial 3
Average
ΔΗ
Mass water, g
24.096
23.976
23.975
Moles of solid, mol
0.01763
001767
0101781
Temp. change, °C
2.9°C
11700
2.0°C
Heat of reaction, J
-292.37J -170.473
-193.26J
AH, kJ/mole
16.58K 9.647 kJ 10.85 kr
16.58K59.64701
KJ
mol
12.35k
Minimum AS,
J/mol K
41.582
mol-k
Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn &
Show your calculations for:
AH in J and then in kJ/mole for Trial 1:
qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J
qsin =
qrxn =
292.35 292.37J
AH in J = 292.375 0.2923kJ
0.01763m01
=1.65×107
AH in kJ/mol =
=
16.58K
0.01763mol
mol
qrx
Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con
Kelvin.)
AS=AHIT
(1.65×10(9.64×103) + (1.0
Jimai
For the compound: C8H17NO2
Use the following information to come up with a plausible structure:
8
This compound has "carboxylic acid amide" and ether functional groups.
The peaks at 1.2ppm are two signals that are overlapping one another.
One of the two signals is a doublet that represents 6 hydrogens; the
other signal is a quartet that represents 3 hydrogens.
Chapter 25 Solutions
Introduction to General, Organic and Biochemistry
Ch. 25.2 - Problem 25-1 Draw the structure of UMP.Ch. 25 - 25-2 What structures Of the cell, visible in a...Ch. 25 - 25-3 Name one hereditary disease.Ch. 25 - 25-4 What is the basis unit of heredity?Ch. 25 - 25-5 (a) Where in a cell is the DNA located? (b)...Ch. 25 - 25-6 What are the components of (a) a nucleotide...Ch. 25 - 25-7 What are the differences between DNA and RNA?Ch. 25 - 25-8 Draw the structures of ADP and GDP. Are these...Ch. 25 - Prob. 25.9PCh. 25 - 25-10 Which DNA and RNA bases contain a carbonyl...
Ch. 25 - Prob. 25.11PCh. 25 - Prob. 25.12PCh. 25 - Prob. 25.13PCh. 25 - Prob. 25.14PCh. 25 - Prob. 25.15PCh. 25 - Prob. 25.16PCh. 25 - Prob. 25.17PCh. 25 - 25-18 What type of bond connects the base to the...Ch. 25 - Prob. 25.19PCh. 25 - 25-20 What constitutes the backbone of DNA?Ch. 25 - Prob. 25.21PCh. 25 - 25-22 In DNA, which carbon atoms of...Ch. 25 - 25-23 The sequence Of a short DNA segment is...Ch. 25 - Prob. 25.24PCh. 25 - Prob. 25.25PCh. 25 - Prob. 25.26PCh. 25 - Prob. 25.27PCh. 25 - Prob. 25.28PCh. 25 - 25-29 What constitutes the superstructure of...Ch. 25 - 25-30 What is the primary structure of DNA?Ch. 25 - 25-31 What is the secondary structure of DNA?Ch. 25 - 25-32 What is the major groove of a DNA helix?Ch. 25 - 25-33 What are the higher-order structures of DNA...Ch. 25 - 25-34 Which type Of RNA has enzyme activity? Where...Ch. 25 - 25-35 Which has the longest chains: tRNA, mRNA, or...Ch. 25 - 25-36 Which type of RNA contains modified...Ch. 25 - 25-37 Which type Of RNA has a sequence exactly...Ch. 25 - 25-38 Where is rRNA located in the cell?Ch. 25 - Prob. 25.39PCh. 25 - Prob. 25.40PCh. 25 - Prob. 25.41PCh. 25 - Prob. 25.42PCh. 25 - Prob. 25.43PCh. 25 - 25-44 What is IncRNA and what does it do?Ch. 25 - Prob. 25.45PCh. 25 - Prob. 25.46PCh. 25 - Prob. 25.47PCh. 25 - Prob. 25.48PCh. 25 - Prob. 25.49PCh. 25 - 25-50 Define: (a) Intron (b) ExonCh. 25 - 25-51 Does mRNA also have introns and exons?...Ch. 25 - Prob. 25.52PCh. 25 - Prob. 25.53PCh. 25 - 25-54 Do all genes code for a protein? If not,...Ch. 25 - 25-55 A DNA molecule normally replicates itself...Ch. 25 - 25-56 Which functional groups on the bases form...Ch. 25 - Prob. 25.57PCh. 25 - 25-58 Draw the structures of cytosine and guanine...Ch. 25 - 25-59 How many different bases are present in a...Ch. 25 - Prob. 25.60PCh. 25 - 25-61 Why is replication called semiconservative?Ch. 25 - 25-62 How does the removal of some positive...Ch. 25 - 25-63 Write the chemical reaction for the...Ch. 25 - Prob. 25.64PCh. 25 - 25-65 What are helicases? What is their function?Ch. 25 - 25-66 Can dATP Serve as a source for a primer?Ch. 25 - Prob. 25.67PCh. 25 - Prob. 25.68PCh. 25 - 25-69 In which direction is the DNA molecule...Ch. 25 - Prob. 25.70PCh. 25 - Prob. 25.71PCh. 25 - Prob. 25.72PCh. 25 - 25-73 From the perspective of the chain being...Ch. 25 - Prob. 25.74PCh. 25 - Prob. 25.75PCh. 25 - 25-76 When cytosine is deaminated, uracil is...Ch. 25 - Prob. 25.77PCh. 25 - 25-78 What are AP sites? Which enzyme creates...Ch. 25 - Prob. 25.79PCh. 25 - Prob. 25.80PCh. 25 - Prob. 25.81PCh. 25 - Prob. 25.82PCh. 25 - Prob. 25.83PCh. 25 - Prob. 25.84PCh. 25 - Prob. 25.85PCh. 25 - Prob. 25.86PCh. 25 - Prob. 25.87PCh. 25 - 25-88 (Chemical Connections 25B) How does...Ch. 25 - Prob. 25.89PCh. 25 - Prob. 25.90PCh. 25 - Prob. 25.91PCh. 25 - Prob. 25.92PCh. 25 - Prob. 25.93PCh. 25 - 25-94 (Chemical Connection 25D) What would be some...Ch. 25 - Prob. 25.95PCh. 25 - (Chemical Connection 25D) Why might a person make...Ch. 25 - Prob. 25.97PCh. 25 - Prob. 25.98PCh. 25 - Prob. 25.99PCh. 25 - Prob. 25.100PCh. 25 - Prob. 25.101PCh. 25 - Prob. 25.102PCh. 25 - Prob. 25.103PCh. 25 - -104 Why is it important that a DNA molecule be...Ch. 25 - Prob. 25.105PCh. 25 - Prob. 25.106PCh. 25 - Prob. 25.107PCh. 25 - Prob. 25.108PCh. 25 - -109 In sheep DNA, the mol% of adenine (A) was...Ch. 25 - Prob. 25.110PCh. 25 - Prob. 25.111PCh. 25 - Prob. 25.112PCh. 25 - Prob. 25.113PCh. 25 - -114 How could life have evolved if DNA leads to...Ch. 25 - Prob. 25.115PCh. 25 - Prob. 25.116PCh. 25 - Prob. 25.117P
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