Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 24, Problem 47RE
Interpretation Introduction
Interpretation:
The noncatalytic step, the number of molecules of that would form from one molecule of epinephrine, and the biochemical advantage of such a cascade are to be determined.
Concept introduction:
The chemical messengers that pass information from the source part to the target part are called hormones.
A molecule that acts as a bridge between the hormone and the target part is called the second messenger.
The hormones that principally controls carbohydrate
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Example 1:
1. Suppose an enzyme (MW = 5,000 g/mole) has a concentration of 0.05 mg/L. If the
kcat is 1 x 10 s, what is the theoretical maximum reaction velocity for the
enzyme?
A) 1050 µM/s.
B) 100 µM/s.
C) 150 μM/s.
D) 105 μM/s.
In 1956, E. P. Kennedy and S. B. Weiss published their study of membrane lipid phosphatidylcholine (lecithin) synthesis in rat
liver. Their hypothesis was that phosphocholine joined with some cellular component to yield lecithin. In an earlier experiment,
incubating 32 P-labeled phosphocholine at physiological temperature (37 °C) with broken cells from rat liver yielded labeled
lecithin. This became their assay for the enzymes involved in lecithin synthesis.
Determine the optimal pH for this enzyme and characterize the enzyme activity at different pH values.
-O-P-O-CH2-CH₁₂-N(CH3)3
Phosphocholine
H₂C-O-C-R
HC-O-C-R2
+
+
+
Cell fraction + ?
HC-O-P-O-CH₁₂-CH₂-N(CH),
O
Phosphatidylcholine
The researchers then centrifuged the broken cell preparation
to separate the membranes from the soluble proteins. They
tested three preparations: whole extract, membranes, and
soluble proteins. Table 1 summarizes the results.
Table 1: Cell fraction requirement for incorporation of
32p-phosphocholine into…
Researchers isolated an unknown substance, X, from rabbit muscle. They determined its structure from the following
observations and experiments.
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and the H2O and CO2 produced were measured. This quantitative analysis revealed that X contained 40.00% C, 6.71% H, and
53.29% O by weight.
(b) The molecular mass of X, as determined by mass spectrometry, was 90.00 atomic mass units (u).
(c) Infrared spectroscopy showed that X contained one double bond.
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Chapter 24 Solutions
Biochemistry
Ch. 24 - RECALL What are the two primary molecules that...Ch. 24 - Prob. 2RECh. 24 - RECALL Many components of the glycolytic pathway...Ch. 24 - Prob. 4RECh. 24 - Prob. 5RECh. 24 - REFLECT AND APPLY Why is it somewhat misleading to...Ch. 24 - Prob. 7RECh. 24 - Prob. 8RECh. 24 - Prob. 9RECh. 24 - Prob. 11RE
Ch. 24 - RECALL What do we mean when we say that there is...Ch. 24 - Prob. 13RECh. 24 - Prob. 14RECh. 24 - Prob. 15RECh. 24 - Prob. 16RECh. 24 - BIOCHEMICAL CONNECTIONS People who are both...Ch. 24 - Prob. 18RECh. 24 - Prob. 19RECh. 24 - Prob. 20RECh. 24 - REFLECT AND APPLY Immature rats are fed all the...Ch. 24 - Prob. 22RECh. 24 - Prob. 23RECh. 24 - BIOCHEMICAL CONNECTIONS During colonial times,...Ch. 24 - Prob. 25RECh. 24 - Prob. 26RECh. 24 - Prob. 27RECh. 24 - Prob. 28RECh. 24 - Prob. 29RECh. 24 - Prob. 30RECh. 24 - Prob. 31RECh. 24 - Prob. 32RECh. 24 - Prob. 33RECh. 24 - RECALL The hormone thyroxine is given as an oral...Ch. 24 - Prob. 35RECh. 24 - Prob. 36RECh. 24 - Prob. 37RECh. 24 - Prob. 38RECh. 24 - Prob. 39RECh. 24 - Prob. 40RECh. 24 - Prob. 41RECh. 24 - Prob. 42RECh. 24 - Prob. 43RECh. 24 - Prob. 44RECh. 24 - Prob. 45RECh. 24 - Prob. 46RECh. 24 - Prob. 47RECh. 24 - Prob. 48RECh. 24 - Prob. 49RECh. 24 - Prob. 50RECh. 24 - Prob. 51RECh. 24 - Prob. 52RECh. 24 - Prob. 53RECh. 24 - Prob. 54RECh. 24 - Prob. 55RECh. 24 - Prob. 56RECh. 24 - Prob. 57RECh. 24 - Prob. 58RECh. 24 - Prob. 59RECh. 24 - Prob. 60RECh. 24 - Prob. 61RECh. 24 - Prob. 62RECh. 24 - BIOCHEMICAL CONNECTIONS What is the natural...
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