What four allosteric enzymes or enzyme complexes are responsible for the regulation of the citricacid cycle? Select all that apply.Malate dehydrogenaseFumaraseSuccinyl CoA synthetaseAconitasea-ketogluatarate dehydrogenaseSuccinate dehydrogenasePyruvate dehydrogenaseCitrate synthaseIsocitrate dehydrogenase

The citric acid cycle, also known as the Krebs cycle or the tricarboxylic acid cycle, is a metabolic…

Answered: What four allosteric enzymes or enzyme…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Identify the Krebs cycle enzyme that consumes a 3-carbon substrate molecule, producing a 2- carbon product molecule (attached to acetyl-CoA), along with NADH, and one molecule of CO2. succinyl CoA synthetase a-ketoglutarate dehydrogenase pyruvate dehydrogenase isocitrate dehydrogenase malate dehydrogenase
Choose all the enzymes or enzyme systems of the citric acid cycle that could be classified as oxidoreductases. (Select all that apply.) succinate dehydrogenase aconitase isocitrate dehydrogenase α-ketoglutarate dehydrogenase complex citrate synthase fumarase malate dehydrogenase
Which enzyme is used for both the synthesis and breakdown of acetoacetate? thiolase O HMG-CoA synthase OB-hydroxybutyrate dehydrogenase O B-Ketoacyl-CoA transferase
Of the allosteric enzymes listed below, which are suppressed by NADH? Select all that apply. the pyruvate dehydrogenase complex a-ketoglutarate dehydrogenase complex U isocitrate dehydrogenase pyruvate kinase Ophosphofructokinase hexokinase Oglucokinase
Outline the mechanism of the conversion of a-ketoglutarate to succinylCoA catalyzed by α-ketoglutarate dehydrogenase complex. Include all products, coenzymes, and reactions in your discussion.
Identify a pathway for utilization of the four carbons of acetoacetate in cholesterol biosynthesis. Carry your pathway as far as the rate-determining reaction in cholesterol biosynthesis. Drag the appropriate labels to their respective targets. succinyl-CoA succinate acetyl-CoA CoA-SH acetoacetyl-CoA HMG-CoA 2NADP 2NADPH+ 2H acetoacetate K UHL return to a mevalonate + CoA-SH
1 2 points Order the following TCA cycle metabolites in the order they are produced in one turn of the citric acid cycle. Not all answers will be used. 2 1 4 3 TI Isocitrate Citrate Lactate Pyruvate Oxaloacetate Isocitrate Succinyl-CoA Aconitate 3-Phosphoglycerate -DO
The peroxisomal enzyme b-ketoacyl–CoA-thiolase does notbind medium-chain acyl-CoA, in contrast to the analogousmitochondrial enzyme. Explain why this phenomenon is anadvantage to the cell.
Below is an image of the Krebs cycle: acetyl-CoA oxaloacetate COASH H20 NADH NAD* H20 malate citrate fumarate isocitrate FADH2 NAD* CO2 FAD АТР NADH + ADP succinate GTP NAD+ a-ketoglutarate H20 GDP NADH + CO2 COASH succinyl CoA COASH Consider the conversion of succinate to fumarate, which is coupled with the production the electron carrier FADH2. If this reaction was NOT coupled with the production of FADH2 (and only catalyzed the conversion of succinate to fumarate), how would this impact ATP production through cell respiration? OATP production would stop because no high energy electron carriers would be produced ATP production would still occur, but there would be a much lower ATP yield because a large number of electron carriers are no longer being made ATP production would stop because without FADH2 we will no longer have electrons moving through the electron transport chain ATP production would still occur, but there would be a slightly lower ATP yield because a small number of…
Using the list of enzymes given below, provide all chemical structures and reactions for complete metabolism of the fatty acids 8:0, 18:145 and 12:247,10. It is unnecessary to repeat a reaction once it has been drawn out previously. Refer to the repeated reaction by group and number. Use the next pages if necessary and clearly identify which fatty acid is being metabolized.
You have a crude lysate sample (CL) containing a mixture of six proteins (1, 2, 3, 4, 5, ẞ- galactosidase), and your goal is to obtain purified ẞ-gal. Some characteristics of these proteins are shown in the table below. Protein Alcohol dehydrogenase Carbonic anhydrase Insulin B chain Phosphorylase B Glutamic dehydrogenase B-galactosidase 45% Concentration of ammonium sulfate (AS) required for precipitation Molecular Weight (kDa) Isoelectric point (pl) 38 3.7 80% 65% 20% 30% 45% 28 4.8 4 5.3 98 6.8 49 9.5 115 5.3 You begin your purification by performing an ammonium sulfate (AS) precipitation. You add the appropriate concentration of AS to your CL sample, incubate overnight at 4°C, then centrifuge to generate a supernatant (AS-S) and pellet (AS-P). What concentration of AS will you use to precipitate Glutamic dehydrogenase? © 20% O 30% 45% 65% 80%

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