Pyruvate carboxylasea) What is the overall function of pyruvate carboxylase?b) Describe the role of each of the four domains in pyruvate carboxylase.c) How do the four domains work together to perform the function of pyruvatecarboxylase?

(a) A metabolic enzyme called pyruvate carboxylase takes part in the first stage of gluconeogenesis.…

Answered: a) What is the overall function of…

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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Describe how a) Mean Arterial Pressure, b) Maximal Oxygen Consumption, and c) Blood Flow are determined using its formula. In addition, you should explain what those factors are including cardiac output, stroke volume, heart rate, resistance, a-vO2 difference, etc. Describe how many ATPs can be generated by complete cycles of beta oxidation of free fatty acid with 20 carbons. You should indicate how many cycles of beta oxidation and Krebs cycle, and total number of products as well
Answer A,B,C
Which of the following condenses acyl and malonyl groups? a) Acetyl co-A ACP transacetylase b) Malonyl co-A ACP transferase c) ß-ketoacyl ACP synthase d) Acyl carrier protein
which of the following functions matches with the coenzyme functions: a.) facilitate redox reaction in the anabolic pathway b.) carry acyl group via a thioester bond c.) facilitate redox reaction involving C=O in the catabolic pathway d.) facilitate redox reaction involving C=C CoEnzymes to pair the functions from: NAD+ FAD NADP+ Coenzyme A
(b) Biotin is a coenzyme required for a key step in gluconeogenesis. (i) To which enzyme is biotin linked and what is the nature of the bond? (ii) What properties do the biotin and the linkage have that enable biotin to interact with two distinct active sites in this enzyme? (iii) What chemical steps take place at each of these active sites (no need to specify the complete reactions)?
How many ATP equivalents are consumed in the conversion of each of the following to a glucosyl residue in glycogen? (a) Dihydroxyacetone phosphate (b) Fructose-1,6-bisphosphate (c) Pyruvate (d) Glucose-6-phosphate
15
Concerning the use of pyruvate when ratio of NADH/NAD+ is low, what is the fate of the carbon labeled in pyruvate when metabolized under these conditions? a) Production of glucose b) Oxidation to CO2 via the TCA cycle c) Conversion to pyruvate to generate oxaloacetate to move electrons to the cytosol via the malate shuttle d) Pyruvate is never metabolized by the cell, instead pyruvate is converted to lactate and solely exported for the Cori cycle and dependent on the liver to recycle the carbon skeleton
What two 3-carbon molecules are generated by the cleavage of fructose-1,6-bisphosphate?A) glyceraldehyde-3-phosphate and 3-phosphoglycerateB) glyceraldehyde-3-phosphate and dihydroxyacetone phosphateC) pyruvate and phosphoenolpyruvateD) enolase and 2-phosphoglycerateE) glyceraldehyde-3-phosphate and pyruvate
Adipose triglyceride lipase (ATGL) hydrolyzes a fatty acyl group from: A) monoacylglycerol. B) diacylglycerol. C) triacylglycerol. D) A and C. E) B and C.
Select which of the following enzymes unique to glycolysis are also sites of regulation for glycolysis. Select all that apply. a) glyceraldehyde 3 P dehydrogenase b) PFK c) pyruvate kinase d) hexokinase e) enolase f) phosphoglycerate mutase
Which of the following is a true statement regarding sphingolipid synthesis? (A) The first step in sphingolipid synthesis is the condensation of palmitoyl CoA with aspartate to form b-ketosphinganine.(B) This process requires the reduction of a ketone that uses NADH as the reducing agent.(C) A fatty acid is attached to dihydrosphingosine to form dihydroceramide. (D) FAD is using as an oxidizing agent to remove a double bond from dihydroceramide.(E) The formation of sphingomyelin requires the attachment of a glucose or galactose molecule to ceramide.

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a) What is the overall function of pyruvate carboxylase? b) Describe the role of each of the four domains in pyruvate carboxylase. c) How do the four domains work together to perform the function of pyruvate carboxylase?