BIOCHEMISTRY (LL)
9th Edition
ISBN: 9781337805100
Author: Campbell
Publisher: CENGAGE L
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Chapter 13, Problem 10RE
RECALL Give three examples of DNA palindromes.
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At a pH equal to the isoelectric point (pl) of alanine, the net charge of alanine is zero. Two structures can be drawn that have a
net charge of zero, but the predominant form of alanine at its pl is zwitterionic.
CH3
H,N
CH3
**
H¸N-C
H
Zwitterionic
H
Uncharged
OH
Select statements that explain why alanine is predominantly zwitterionic at its pl.
pk of alanine's amino group is more than its pl.
pk of alanine's carboxyl group is more than its pl.
PK of alanine's carboxyl group is less than its pl.
pk of alanine's amino group is less than its pl.
Correct Answer
What fraction of alanine is in the completely uncharged form at its pl?
1 in 2.2 × 107
1 in 1.6 × 10²
1 in 4680
1 in 9460
How does a voltage-gated sodium channel work? Specifically, how and why does a change in voltage trigger their opening? Please be detailed
When sodium ions enter a neuron during depolarization, they trigger the opening of additional voltage-gated sodium channels nearby, creating a positive feedback loop where the influx of sodium ions further depolarizes the membrane, causing even more sodium channels to open and allowing more sodium ions to enter the cell, thus sustaining the depolarization process until the action potential peaks. But how and why exactly does the influx of sodium ions trigger more sodium channels to let in more sodium? Please explain
Chapter 13 Solutions
BIOCHEMISTRY (LL)
Ch. 13 - RECALL What advantages does fluorescent labeling...Ch. 13 - RECALL What methods are used to visualize...Ch. 13 - REFLECT AND APPLY When proteins are separated...Ch. 13 - RECALL How does the use of restriction...Ch. 13 - RECALL What is the importance of methylation in...Ch. 13 - RECALL Why do restriction endonucleases not...Ch. 13 - Prob. 7RECh. 13 - Prob. 8RECh. 13 - RECALL What do the following have in common? MOM;...Ch. 13 - RECALL Give three examples of DNA palindromes.
Ch. 13 - RECALL What are three differences between the...Ch. 13 - RECALL What are sticky ends? What is their...Ch. 13 - RECALL What would be an advantage of using HaeIII...Ch. 13 - RECALL Describe the cloning of DNA.Ch. 13 - RECALL What vectors can be used for cloning?Ch. 13 - RECALL Describe the method you would use to test...Ch. 13 - RECALL What is blue/white screening? What is the...Ch. 13 - Prob. 18RECh. 13 - Prob. 19RECh. 13 - Prob. 20RECh. 13 - Prob. 21RECh. 13 - Prob. 22RECh. 13 - Prob. 23RECh. 13 - REFLECT AND APPLY What are the requirements for an...Ch. 13 - Prob. 25RECh. 13 - Prob. 26RECh. 13 - REFLECT AND APPLY The genes for both the a- and...Ch. 13 - REFLECT AND APPLY Outline the methods you would...Ch. 13 - Prob. 29RECh. 13 - Prob. 30RECh. 13 - Prob. 31RECh. 13 - Prob. 32RECh. 13 - RECALL Why is temperature control so important in...Ch. 13 - RECALL Why is the use of temperature-stable DNA...Ch. 13 - RECALL What are the criteria for good primers in a...Ch. 13 - REFLECT AND APPLY What difficulties arise in the...Ch. 13 - REFLECT AND APPLY Each of the following pairs of...Ch. 13 - RECALL What is qPCR?Ch. 13 - Prob. 39RECh. 13 - REFLECT AND APPLY Suppose that you are a...Ch. 13 - REFLECT AND APPLY Why is DNA evidence more useful...Ch. 13 - REFLECT AND APPLY Give the DNA sequence for the...Ch. 13 - Prob. 43RECh. 13 - Prob. 44RECh. 13 - Prob. 45RECh. 13 - Prob. 46RECh. 13 - Prob. 47RECh. 13 - RECALL Has proteomic analysis been done on...Ch. 13 - Prob. 49RECh. 13 - Prob. 50RECh. 13 - Prob. 51RECh. 13 - RECALL What are the key differences between DNA...
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