BIOCHEMISTRY (LL)
9th Edition
ISBN: 9781337805100
Author: Campbell
Publisher: CENGAGE L
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Chapter 18, Problem 44RE
Interpretation Introduction
Interpretation:
The chemical structure difference in glucagon and epinephrine is to be determined.
Concept interpretation:
A hormone is an important molecule that acts as a chemical messenger in the body. Apart from signaling, they also have major effects on
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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 18 Solutions
BIOCHEMISTRY (LL)
Ch. 18 - RECALL Why is it essential that the mechanisms...Ch. 18 - RECALL How does phosphorolysis differ from...Ch. 18 - RECALL Why is it advantageous that breakdown of...Ch. 18 - RECALL Briefly outline the role of UDPG in...Ch. 18 - RECALL Name two control mechanisms that play a...Ch. 18 - REFLECT AND APPLY Does the net gain of ATP in...Ch. 18 - REFLECT AND APPLY In metabolism,...Ch. 18 - Prob. 8RECh. 18 - BIOCHEMICAL CONNECTIONS You are planning to go on...Ch. 18 - BIOCHEMICAL CONNECTIONS Would eating candy bars,...
Ch. 18 - Prob. 11RECh. 18 - Prob. 12RECh. 18 - REFLECT AND APPLY A researcher claims to have...Ch. 18 - REFLECT AND APPLY What is the source of the energy...Ch. 18 - Prob. 15RECh. 18 - Prob. 16RECh. 18 - Prob. 17RECh. 18 - Prob. 18RECh. 18 - Prob. 19RECh. 18 - RECALL What reactions in this chapter require...Ch. 18 - RECALL Which steps of glycolysis are irreversible?...Ch. 18 - RECALL What is the role of biotin in...Ch. 18 - RECALL How does the role of glucose-6-phosphate in...Ch. 18 - REFLECT AND APPLY Avidin, a protein found in egg...Ch. 18 - REFLECT AND APPLY How does the hydrolysis of...Ch. 18 - Prob. 26RECh. 18 - Prob. 27RECh. 18 - Prob. 28RECh. 18 - Prob. 29RECh. 18 - Prob. 30RECh. 18 - Prob. 31RECh. 18 - REFLECT AND APPLY How can different time scales...Ch. 18 - REFLECT AND APPLY How do the control mechanisms in...Ch. 18 - Prob. 34RECh. 18 - Prob. 35RECh. 18 - Prob. 36RECh. 18 - REFLECT AND APPLY How can the synthesis and...Ch. 18 - REFLECT AND APPLY How is it advantageous for...Ch. 18 - Prob. 39RECh. 18 - Prob. 40RECh. 18 - Prob. 41RECh. 18 - Prob. 42RECh. 18 - RECALL What roles do glucagon and epinephrine play...Ch. 18 - Prob. 44RECh. 18 - RECALL List three differences in structure or...Ch. 18 - RECALL What are four possible metabolic fates of...Ch. 18 - BIOCHEMICAL CONNECTIONS What is the connection...Ch. 18 - Prob. 48RECh. 18 - RECALL What is a major difference between...Ch. 18 - Prob. 50RECh. 18 - Prob. 51RECh. 18 - Prob. 52RECh. 18 - REFLECT AND APPLY Suggest a reason why a different...Ch. 18 - REFLECT AND APPLY Explain how the pentose...Ch. 18 - REFLECT AND APPLY Why is it reasonable to expect...Ch. 18 - REFLECT AND APPLY How would it affect the...
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