Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 22, Problem 30P
Interpretation Introduction
Interpretation:
The ratio of 3H to 14C in palmitic acid should be determined.
Concept introduction:
The process of fatty acid synthesis occurs in the cytosol of the animal cells, while it occurs in the stroma of chloroplast in the plant cells. It is a stepwise process, which occurs by the addition of two-carbon units. These carbon units are provided by the acetyl-CoA, derived from glucose oxidation.
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29. Labels. Suppose that you had an in vitro fatty acid-
synthesizing system that had all of the enzymes and cofactors
required for fatty acid synthesis except for acetyl CoA. To
this system, you added acetyl CoA that contained radioactive
hydrogen (³H, tritium) and carbon 14 (¹4C) as shown here.
3H O
14
3H-C-C SCOA
3H
The ratio of ³H/¹4C is 3. What would the ³H/14C ratio be
after the synthesis of palmitic acid (C₁6) with the use of the
radioactive acetyl CoA?
METABOLIC PATHWAYS. Carefully analyze the diagram below. Complete the diagram
below by providing the name of the pathway (in oblongs beside arrows), OR the product or
the precursor (rectangles). Choose your answer from the terms provided below. Write the
capital letters of your answer on the space provided. The same answer can be used more
than once.
starch
sucrose
lactose
19
20
18
glucose
gly cogen
glycogenoly sis
17
Urea
1
cycle
glucose
ribos
3
16
gluconeogenesis
glycolysis
some amino acids
4
lactic acid
amino acid catabolism
15
13
11
6
fats
12
acety FCOA
ketone bodi
14
fatty add
synthesis
A.glucose
B.fructose
TERM BANK
P. glycolysis
Q. glycogenolysis
C. galactose R. lipolys is
FAD
NAD+
S. ketogenesis
E. pyruvate T. B-oxidation
F.NADPH U. Kreb's cycle
G. FADH2 V. fermentation
W. glycogenesis
X. lipogenesis
J. glycerol Y.hydrolysis
Z. oxidation
AB. pentose phosphate
pathway
N. cellulose XY, electron transport
chain
D. urea
10
8
H. NADH
I. NH3
9.
K. H20
L. CO2
АТР
M. maltose
O. fatty…
Tracing glucose. Glucose labeled with 14 C at C-6 is added to a solution containing the enzymes and cofactors of the oxidative phase of the pentose phosphate pathway. What is the fate of the radioactive label?
Chapter 22 Solutions
Biochemistry
Ch. 22 - Prob. 1PCh. 22 - Prob. 2PCh. 22 - Prob. 3PCh. 22 - Prob. 4PCh. 22 - Prob. 5PCh. 22 - Prob. 6PCh. 22 - Prob. 7PCh. 22 - Prob. 8PCh. 22 - Prob. 9PCh. 22 - Prob. 10P
Ch. 22 - Prob. 11PCh. 22 - Prob. 12PCh. 22 - Prob. 13PCh. 22 - Prob. 14PCh. 22 - Prob. 15PCh. 22 - Prob. 16PCh. 22 - Prob. 17PCh. 22 - Prob. 18PCh. 22 - Prob. 19PCh. 22 - Prob. 20PCh. 22 - Prob. 21PCh. 22 - Prob. 22PCh. 22 - Prob. 23PCh. 22 - Prob. 24PCh. 22 - Prob. 25PCh. 22 - Prob. 26PCh. 22 - Prob. 27PCh. 22 - Prob. 28PCh. 22 - Prob. 29PCh. 22 - Prob. 30PCh. 22 - Prob. 31PCh. 22 - Prob. 32PCh. 22 - Prob. 33PCh. 22 - Prob. 34PCh. 22 - Prob. 35PCh. 22 - Prob. 36PCh. 22 - Prob. 37PCh. 22 - Prob. 38PCh. 22 - Prob. 39PCh. 22 - Prob. 40PCh. 22 - Prob. 41PCh. 22 - Prob. 42PCh. 22 - Prob. 43PCh. 22 - Prob. 44PCh. 22 - Prob. 45PCh. 22 - Prob. 46PCh. 22 - Prob. 47PCh. 22 - Prob. 48PCh. 22 - Prob. 49PCh. 22 - Prob. 50PCh. 22 - Prob. 51PCh. 22 - Prob. 52PCh. 22 - Prob. 53PCh. 22 - Prob. 54PCh. 22 - Prob. 55PCh. 22 - Prob. 56PCh. 22 - Prob. 57PCh. 22 - Prob. 58PCh. 22 - Prob. 59PCh. 22 - Prob. 60PCh. 22 - Prob. 61PCh. 22 - Prob. 62P
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