The carbon skeletons of many amino acids can be used to replenish theintermediates of the citric acid cycle.Select one:TrueO FalseWhich of the following compound is a positive allosteric modifier of the enzymepyruvate carboxylase?Select one:a. BiotinO b. OxaloacetateO c. Fructose-6-PO d. ATPOe. Acetyl-CoAWhich of the following compounds serve as a primary link between the TCA cycleand the urea cycle?Select one:O a. succinateb. fumarateO c. oxaloacetateO d. malateO e. citrateA specific inhibitor for succinate dehydrogenase is:Select one:O a. Citrateb MalonateO c. ArseniteO d. FluorideO e. Cyanide

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Answered: The carbon skeletons of many amino…

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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Consider 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]
Which class of enzymes catalyzes the following reactions? CH2- CH2- CH2 H2- C- CH2 AST CH2-C CH2 CH-NH + C=O + C=0 + CH-NH ČO0 Čo0 ČO0 ČO0" Aspartate Oxoglutarate Oxaloacetate Glutamate Select one: a. Oxidoreductase O b. Isomerase O c. Ligase d. Transferase
Complex allosteric regulation of the aspartate transcarbamoylase reaction is significant because it links - --- O A. opiate with neurotransmitter O B. glycolysis and lactic acid fermentation OC. amino acid and nitrogenous base metabolism citric acid cycle and catecholamine biosynthesis D. O E. glycolysis and fatty acid metabolism
Drawthe structures of the two citric acid cycle intermediates that can be converted into amino acids in a single step by transamination. What amino acids do they produce?Draw their structures.
Describe the function implied by the name of each of thefollowing enzymes:a. Citrate decarboxylaseb. Adenosine diphosphate phosphorylasec. Oxalate reductased. Nitrite oxidasee. cis-trans Isomerase
Consider the docosanoic acid, C21H43CO2H a. Label the a and B carbons b. Draw the acyl CoA derived from this fatty acid c. How many acetyl CoA molecules are formed by complete B-oxidation? d. How many cycles of B-oxidation are needed for complete oxidation? e. How many molecules of ATP are formed from the complete catabolism of this fatty acid?
Match the following metabolites with the correct metabolic pathway A. Kreb's cycle v Propionyl-CoA B. Soluble fiber fermenta v Dihydroxy acetone phosphate C. Cholesterol synthesis v succinyl co-A D. glycolysis v Hydroxy methyl glutaryl coA E. Beta oxidation v Hydroxy-butyrate QUESTION 28 When a 23 Carbon fatty acid is metaboližed, what is the total number of (GROSS) ATP produced 7 QUESTION 29 When a 23 Carbon fattv acid is metabolized the numbher of NET ATD produced is? Click Save and Submit to save and submit. Click Save All Answers to save all answers. Esc F3 Fs
For the pyruvate dehydrogenase complex, please identify the oxidation states of every atom and prove whether the reaction is oxidized or not Pyruvate --> Hydroxyethyl TPP B. Hydroexythl TPP --> Acetyl Lipoylysine C. Acetyl Lipoylysine --> Acetyl-CoA
Some bacteria use the citric acid cycle intermediate, α-ketoglutarate, plusacetyl-CoA, as the starting point for lysine biosynthesis. The first partof this biosynthetic pathway uses the same chemical strategy found inthe citric acid cycle. Propose a four-step pathway for the conversion ofα-ketoglutarate to 2-oxoadipate. Draw the three missing intermediates, andindicate the chemistry involved in each reaction. Include any cofactors thatyou think might be required for specific steps.
Glucose is converted to pyruvate in glycolysis, yielding a netsynthesis of 2 ATP. In certain cells pyruvate can be reconverted to glucose during gluconeogenesis. How many ATPsare required to convert pyruvate back to glucose?
Compare and contrast Pyruvate Dehydrogenase with a-ketoglutarate dehydrogenaseOutline the mechanisms of both enzymes. Discuss the functions of the coenzymes. List the similarities and the differences between the 2 enzymes. Both are very large membrane bound complexes. What are the advantages of this strategy?Do a bit or research on the structure one of these enzymes. (include one recent reference) – How detailed is the enzyme structure known? What insight(s) does this structural detail give you about the enzyme mechanism.
Predict the function of each of the following enzyme: 1. Pyruvate carboxylase

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