FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
5th Edition
ISBN: 9781119750192
Author: Voet
Publisher: WILEY
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Chapter 11, Problem 8E
Summary Introduction
To calculate: The rate enhancement that could be accomplished by an enzyme forming one low-barrier hydrogen bond with its transition state at 25°C.
Concept introduction: Enzymes are biocatalysts that
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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 11 Solutions
FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
Ch. 11 - Prob. 1ECh. 11 - 2. What is the relationship between the rate of an...Ch. 11 - 3. Which type of enzyme (Table 11-2) catalyzes the...Ch. 11 - 4. Which type of enzyme (Table 11-2) catalyzes the...Ch. 11 - 5. On the free energy diagram shown, label the...Ch. 11 - Prob. 6ECh. 11 - 7. Approximately how much does staphylococcal...Ch. 11 - 8. Calculate the rate enhancement that could be...Ch. 11 - 9. Explain why enzyme activity varies with...Ch. 11 - 10. The covalent catalytic mechanism of an enzyme...
Ch. 11 - Prob. 11ECh. 11 - 12. Explain why RNase A cannot catalyze the...Ch. 11 - 13. Urease, the first enzyme to be crystallized,...Ch. 11 - 14. Wolfenden has stated that it is meaningless to...Ch. 11 - 15. Explain why lysozyme cleaves the artificial...Ch. 11 - 16. Would you expect lysozyme to hydrolyze...Ch. 11 - 17. Design a chloromethylketone inhibitor of...Ch. 11 - 18. Predict the effect of mutating Asp 102 of...Ch. 11 - 19. Diagram the hydrogen-bonding interactions of...Ch. 11 - Prob. 20ECh. 11 - 21. Using the reaction shown in Box 11-1 (the...Ch. 11 - Prob. 22CQCh. 11 - 23. What feature of RNA would allow it to function...Ch. 11 - 24. Suggest a transition state analog for proline...Ch. 11 - 25. Lysozyme residues Asp 101 and Arg 114 are...Ch. 11 - 26. Predict the effect on lysozyme’s activity of...Ch. 11 - Prob. 27CQCh. 11 - Prob. 28CQCh. 11 - Prob. 29CQCh. 11 - 30. Many of the cell’s hydrolytic enzymes are...Ch. 11 - Prob. 31CQCh. 11 - Prob. 32CQCh. 11 - Prob. 1MTE
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