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 17, Problem 2P
Interpretation Introduction
Interpretation: The option which is not a component of citric acid cycle needs to be identified.
Concept Introduction:
The citric acid cycle is a catabolic process. It is also known as the TCA cycle or Krebs cycle. It is a series of
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G. ENZYME CLASSIFICATION.
Identify the main class of enzymes used to catalyzed the following reactions:
1. Lactate dehydrogenase:
NADH+H
NAD
HC-OH
CH3
CH
Pynnte
Lactate
2. Methylmalonyl-CoA mutase:
CH CH
SCOA
CH,CH,
SCOA
coenzyme B12
COO
COO
methylmalonyl-CoA
succinyl-CoA
3. Enolase:
0.
H–Ċ–0–P–0-
C-0–P-0- + H,0
HO–CH,
CH 6
Phosphoenolpyruvate
2-Phosphoglycerate
4. Chymotrypsin:
-0–CH,CH3 + H2O
- RCOOH + HOCH,CH3
5. Pyruvate carboxylase:
coo
• co, • ATP + H,0
H-C-H . ADP + P, + 2H
čoo
CH,
Pyruvate
Oxaleacetate
. Describe the reaction steps of the citric acid cycle with a focus on their control. In addition
discuss the energy provided to a living cell from the metabolism of one acetyl-CoA entering
the citric acid cycle
- Keto counterparts. Name the a-ketoacida-ketoacid that is formed by
the transamination of each of the following amino acids: Co,
a. Alanine
b. Leucine
c. Aspartate
d. Phenylalanine
e. Glutamate
f. Tyrosine
Chapter 17 Solutions
Biochemistry
Ch. 17 - Prob. 1PCh. 17 - Prob. 2PCh. 17 - Prob. 3PCh. 17 - Prob. 4PCh. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - Prob. 10P
Ch. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - Prob. 13PCh. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - Prob. 18PCh. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - Prob. 21PCh. 17 - Prob. 22PCh. 17 - Prob. 23PCh. 17 - Prob. 24PCh. 17 - Prob. 25PCh. 17 - Prob. 26PCh. 17 - Prob. 27PCh. 17 - Prob. 28PCh. 17 - Prob. 29PCh. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Prob. 33PCh. 17 - Prob. 34PCh. 17 - Prob. 35PCh. 17 - Prob. 36PCh. 17 - Prob. 37PCh. 17 - Prob. 38PCh. 17 - Prob. 39PCh. 17 - Prob. 40PCh. 17 - Prob. 41PCh. 17 - Prob. 42PCh. 17 - Prob. 43PCh. 17 - Prob. 44P
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- Long explanations are not needed. True or Falsea. One NADH is produced for every pyruvate molecule undergoing oxidation using the enzyme pyruvate dehydrogenase complex b. Erythrose-4-phosphate can be synthesized using the pentose phosphate pathway.arrow_forwardLong explanations are NOT NEEDED. ATP accounting. Consider 1 molecule of the sucrose (monomeric units: glucose and fructose) that will undergo complete oxidation. d. Number of NADH and FADH2 produced from Krebs cycle.e. Net ATP produced (complete oxidation via Malate aspartate shuttle).arrow_forward. Glucagon secretion causes inhibition of intracellular acetyl-CoA car- boxylase activity by several mechanisms. Name all you can think of.arrow_forward
- Long explanations are NOT NEEDED. ATP accounting. Consider 1 molecule of the sucrose (monomeric units: glucose and fructose) that will undergo complete oxidation. a. Number of pyruvate molecules after glycolysis.b. Net ATP produced in glycolysis only (via substrate-level phosphorylation).c. Number of NADH produced using the pyruvate dehydrogenase complex reaction.d. Number of NADH and FADH2 produced from Krebs cycle.e. Net ATP produced (complete oxidation via Malate aspartate shuttle).arrow_forwardLong explanations are not needed. Direct answers would suffice. a. High concentration of glucose 6-phosphate is inhibitory to the enzyme hexokinase. I. True II. False b. Which compound is formed when NAH reduces pyruvate (anaerobic condition)? I. lactate II. alpha-ketoglutarate III. glucose IV. oxaloacetatearrow_forwardBIOCHEMISTRY. Could glycerol be used to regenerate the OAA for maintenance of TCA cycle activity? Yes or No? Explain.arrow_forward
- Long explanations are not needed. Direct answers would suffice. a. Ribose-5-phosphate is produced by oxidative decarboxylation of 6-phosphogluconate catalyzed by the enzyme glucose-6-phosphate dehydrogenase. I. True II. False b. The pentose phosphate pathway occurs in the mitochondrion of tissues actively engaged in synthesis of fatty acids. I. True II. Falsearrow_forwardConsider docosanoic acid C12H43CO2H a. Label the alpha and beta Carbons. Show the beta-oxidation in an EXPANDED structure. b. Draw each acyl CoA derived from this fatty acid. c. How many acetyl Co A molecules are formed by complete beta-oxidation? d. How many cycles of beta-oxidation are needed for complete oxidation? e. How many molecules of ATP are formed from the complete catabolism of this fatty acid? Show the complete computation. f. How many moles of ATP per gram of fatty acid is formed from the complete catabolism of the given fatty acid? g. What is the molar mass of the given fatty acid? Solution: Show here the complete computations, [from a to e]arrow_forwardAcetyl-CoA and succinyl-CoA are both highenergy thioesters, but their chemical energy is put to differentuses. Elaborate.arrow_forward
- Lipids area. stored primarily as triglycerides.b. synthesized by beta-oxidation.c. broken down by oxidative deamination.d. All of these are correct.arrow_forwardIn considering the carbohydrate maltose... a. How many molecules of acetyl CoA are formed from its complete catabolism? b. How many rounds of Citric acid Cycle must occur to complete catabolism? c. How many rounds of electron transport chain and oxidative phosphorylation?arrow_forwardSelect the BEST answer. Increasing the concentration of Fructose-2,6 bisphosphate would Inhibit Phosphofructokinase 2 Increase the concentration of Fructose-1,6 bisphosphate (phosphofructose isomerase) O increase the synthesis of glycogen Increase the carboxylation of Ac-CoA to make more malonyl-CoA increase the concentration of Pyruvatearrow_forward
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