Biochemistry
8th Edition
ISBN: 9781285429106
Author: Campbell, Mary K., FARRELL, Shawn O.
Publisher: Cengage Learning,
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Chapter 16, Problem 40RE
REFLECT AND APPLY How does the presence of
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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 16 Solutions
Biochemistry
Ch. 16 - RECALL Define the following terms: polysaccharide,...Ch. 16 - RECALL Name which, if any, of the following are...Ch. 16 - RECALL Name which, if any, of the following groups...Ch. 16 - RECALL What is the difference between an...Ch. 16 - RECALL How many possible epimers of D-glucose...Ch. 16 - RECALL Why are furanoses and pyranoses the most...Ch. 16 - RECALL How many chiral centers are there in the...Ch. 16 - REFLECT AND APPLY Following are Fischer...Ch. 16 - REFLECT AND APPLY The sugar alcohol often used in...Ch. 16 - REFLECT AND APPLY Consider the structures of...
Ch. 16 - REFLECT AND APPLY Two sugars are epimers of each...Ch. 16 - REFLECT AND APPLY How does the cyclization of...Ch. 16 - REFLECT AND APPLY Convert the following Haworth...Ch. 16 - REFLECT AND APPLY Convert each of the following...Ch. 16 - REFLECT AND APPLY Starting with a Fischer...Ch. 16 - REFLECT AND APPLY Starting with the open-chain...Ch. 16 - RECALL What is unusual about the structure of...Ch. 16 - RECALL What is the chemical difference between a...Ch. 16 - RECALL Define the term reducing sugar.Ch. 16 - BIOCHEMICAL CONNECTIONS What are the structural...Ch. 16 - RECALL Name two differences between sucrose and...Ch. 16 - REFLECT AND APPLY Draw a Haworth projection for...Ch. 16 - BIOCHEMICAL CONNECTIONS What is the metabolic...Ch. 16 - REFLECT AND APPLY Draw Haworth projection formulas...Ch. 16 - BIOCHEMICAL CONNECTIONS A friend asks you why some...Ch. 16 - RECALL What are some of the main differences...Ch. 16 - RECALL How does chitin differ from cellulose in...Ch. 16 - RECALL How does glycogen differ from starch in...Ch. 16 - RECALL What is the main structural difference...Ch. 16 - RECALL What is the main structural difference...Ch. 16 - RECALL How do the cell walls of bacteria differ...Ch. 16 - REFLECT AND APPLY Pectin, which occurs in plant...Ch. 16 - REFLECT AND APPLY Advertisements for a food...Ch. 16 - REFLECT AND APPLY Explain how the minor structural...Ch. 16 - REFLECT AND APPLY All naturally occurring...Ch. 16 - REFLECT AND APPLY An amylose chain is 5000 glucose...Ch. 16 - REFLECT AND APPLY Suppose that a polymer of...Ch. 16 - REFLECT AND APPLY Glycogen is highly branched....Ch. 16 - REFLECT AND APPLY No animal can digest cellulose....Ch. 16 - REFLECT AND APPLY How does the presence of -bonds...Ch. 16 - REFLECT AND APPLY How do the sites of cleavage of...Ch. 16 - BIOCHEMICAL CONNECTIONS What is the benefit of...Ch. 16 - REFLECT AND APPLY How would you expect the active...Ch. 16 - REFLECT AND APPLY Would you expect cross-linking...Ch. 16 - REFLECT AND APPLY Compare the information in the...Ch. 16 - REFLECT AND APPLY Why is it advantageous that...Ch. 16 - REFLECT AND APPLY Why is the polysaccharide chitin...Ch. 16 - REFLECT AND APPLY Could bacterial cell walls...Ch. 16 - REFLECT AND APPLY Some athletes eat diets high in...Ch. 16 - Prob. 50RECh. 16 - REFLECT AND APPLY Blood samples for research or...Ch. 16 - REFLECT AND APPLY Based on what you know about...Ch. 16 - RECALL What are glycoproteins? What are some of...Ch. 16 - BIOCHEMICAL CONNECTIONS Briefly indicate the role...
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