Biochemistry
8th Edition
ISBN: 9781285429106
Author: Campbell, Mary K., FARRELL, Shawn O.
Publisher: Cengage Learning,
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Textbook Question
Chapter 17, Problem 14RE
RECALL Which of the enzymes discussed in this chapter are NADH-linked dehydrogenases?
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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 17 Solutions
Biochemistry
Ch. 17 - RECALL Which reaction or reactions that we have...Ch. 17 - RECALL Which reaction or reactions that we have...Ch. 17 - RECALL What are the possible metabolic fates of...Ch. 17 - RECALL Explain the origin of the name of the...Ch. 17 - RECALL Define isozymes and give an example from...Ch. 17 - RECALL Why would enzymes be found as isozymes?Ch. 17 - RECALL Why is the formation of...Ch. 17 - REFLECT AND APPLLY Show that the reaction...Ch. 17 - REFLECT AND APPLLY What is the metabolic advantage...Ch. 17 - REFLECT AND APPLLY What are the metabolic effects...
Ch. 17 - REFLECT AND APPLLY In what way is the observed...Ch. 17 - REFLECT AND APPLLY How does ATP act as an...Ch. 17 - RECALL At what point in glycolysis are all the...Ch. 17 - RECALL Which of the enzymes discussed in this...Ch. 17 - RECALL Define substrate-level phosphorylation and...Ch. 17 - Prob. 16RECh. 17 - RECALL Which molecules act as inhibitors of...Ch. 17 - RECALL Many NADH-linked dehydrogenases have...Ch. 17 - RECALL Several of the enzymes of glycolysis fall...Ch. 17 - Prob. 20RECh. 17 - REFLECT AND APPLLY Is the reaction of...Ch. 17 - Prob. 22RECh. 17 - Prob. 23RECh. 17 - Prob. 24RECh. 17 - Prob. 25RECh. 17 - Prob. 26RECh. 17 - Prob. 27RECh. 17 - Prob. 28RECh. 17 - RECALL If lactic acid is the buildup product of...Ch. 17 - Prob. 30RECh. 17 - Prob. 31RECh. 17 - Prob. 32RECh. 17 - REFLECT AND APPLLY What is unique about TPP that...Ch. 17 - BIOCHEMICAL CONNECTIONS Beriberi is a disease...Ch. 17 - REFLECT AND APPLLY Most hunters know that meat...Ch. 17 - REFLECT AND APPLLY What is the metabolic advantage...Ch. 17 - BIOCHEMICAL CONNECTIONS Cancer cells grow so...Ch. 17 - Prob. 38RECh. 17 - Prob. 39RECh. 17 - REFLECT AND APPLLY Show how the estimate of 33%...Ch. 17 - Prob. 41RECh. 17 - Prob. 42RECh. 17 - Prob. 43RECh. 17 - Prob. 44RECh. 17 - REFLECT AND APPLLY Show, by a series of equations,...Ch. 17 - REFLECT AND APPLLY What should be the net ATP...Ch. 17 - Prob. 47RECh. 17 - Prob. 48RECh. 17 - Prob. 49RECh. 17 - REFLECT AND APPLLY According to Table 17.1,...Ch. 17 - Prob. 51RECh. 17 - Prob. 52RECh. 17 - REFLECT AND APPLLY High levels of...Ch. 17 - Prob. 54RECh. 17 - Prob. 55RE
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