Which statement is not completely true? O Stage 3 is composed of the citric acid cycle, and the elecrtron transport chain coupled with oxidative phosphorylation. O Anabolism are reactions involved in the breakdown of biomolecules - energy is released. O The ultimate goal of the 3 stages of catabolism is to regenerate ATP from ADP. O In Stage 2 of Catabolism, the main energy molecule that all macronutrients are broken down into is Acetyl groups (combined with the shuttle COA) to form Acetyl COA. O An array of chemical reactions (series of steps) that are organized into orderly well regulated sequences are called metabolic pathways. O The purpose of the citric acid cycle is to regenerate NAD* and FAD to NADH and FADH2

Which statement is not completely true? O Stage 3 is composed of the citric acid cycle, and the elecrtron transport chain coupled with oxidative phosphorylation. O Anabolism are reactions involved in the breakdown of biomolecules - energy is released. O The ultimate goal of the 3 stages of catabolism is to regenerate ATP from ADP. O In Stage 2 of Catabolism, the main energy molecule that all macronutrients are broken down into is Acetyl groups (combined with the shuttle COA) to form Acetyl COA. O An array of chemical reactions (series of steps) that are organized into orderly well regulated sequences are called metabolic pathways. O The purpose of the citric acid cycle is to regenerate NAD* and FAD to NADH and FADH2

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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A cell is grown on minimal media containing only 3-phosphoglyceric acid as a source of carbon and energy. What is the most likely place this compound would enter the metabolic cycle? O Glycolysis O Conversion of Pyruvate to Acetyl-CoA O The TCA Cycle The Electron Transport Chain
1a. If you wanted you could take a glucose molecule and convert it to pyruvate via glycolysis and convert it back to glucose via gluconeogenesis. What is the cost of doing so in ATP equivalents? Show how you determine the cost via reactions (no structures). Explain in bioenergetic terms how the conversion of pyruvate to phosphoenolpyruvate in gluconeogenesis overcomes the large, negative standard free- energy change of the pyruvate kinase reaction in glycolysis. b. C. The consumption of alcohol (ethanol), especially after periods of strenuous activity or after not eating for several hours, results in a deficiency of glucose in the blood, a condition known as hypoglycemia. The first step in the metabolism of ethanol by the liver is oxidation to acetaldehyde, catalyzed by liver alcohol dehydrogenase: CH3CH2OH + NAD+ -> CH3CHO + NADH + H+ Explain how this reaction inhibits the transformation of lactate to pyruvate. Why does this lead to hypoglycemia?
n the brain and muscles, in order for cytoplasmic NADH to insert its electrons int the electron transport chain (ETC), it first has to pass its electrons to (i.e. reduce) what molecule? 1. Dihydroxyacetone phosphate 2. Glutathione 3 ATP Synthase 4 Dinitrophenol (DNP)
What would be a likely consequence if step 4 of the citric acid cycle no longer operated far from equilibrium, and instead occurred near equilibrium? the step would need to be coupled to ATP hydrolysis none of these possibilities are likely this step would no longer be a highly regulated step the reaction would no longer occur
glucose Glycoly sis (b). Glucose is split into two 3-carbon chains called AcetylCoEnzymeA in order to enter the Krebs Cycle. Krebs Cycle (c). The waste product (a gas) produced in the Krebs Cycle: Possible answers (not all will be used): alcohol ATP oxygen pyruvate (a). Four of these energy-rich molecules are produced in glycolysis: ATP pyrorate carbon dioxide water- Mitochondria WADH, FADH Electron Transport Chain glucose e.Carbon dioxide (d). 32 of these energy-rich molecules are made in the ETC: ATP (e). This waste product is made when oxygen picks up water carbon dioxide & electrons and protons: which are converted into lactic acid
A cell is grown on minimal media containing only 3-phosphoglyceric acid as a source of carbon and energy. What is the most likely place this compound would enter the metabolic cycle? Group of answer choices Glycolysis Conversion of Pyruvate to Acetyl-CoA The TCA Cycle The Electron Transport Chain
is considered part of aeroof metall *Give an example, taken from digestion, glycolysis, gluconeogenesis or the citric acid cycle of each of the following regulatory mechanisms o for metabolic pathways: feedback inhibition complementary control dividos dje16390solexo to etnuoms pritsuse to 29 dj n geb Isblomple s ewora' euealt Jused pig mort заsdjn -lygiosue nadw.woled awode as Ao02-Iyjobs to no nave asmosed bas dpi od of ejtine evius en a wod nislqxe anoissv19edo 9e9dd to aiasd odd allosterism dw.eesdJnye staadio to yjivijos 9d Sefovo bios bijis 9d 90 10 9361 9dJ 101пoo 9161315 1 00 odd n bobbs ei Ao no .Isbiomph esislupex A00 to noijslupei 101 Isapia adsinqoqqs n eesdaye 9J61Jio 30 noiislupe1 sd 290 to m Soveeld Jised piq ni noijsliqas W hormonal activity Ad-Pantaops zymogen-active enzyme conversion phosphorylation or dephosphorylation Vis din
All of the following statements about the citric acid cycle are true except: O The citric acid cycle occurs in the cytoplasm of prokaryotes. O The citric acid cycle regenerates NAD+ and FAD. O The citric acid cycle involves one or more redox reactions. O The citric acid cycle is part of cellular respiration.
Which of the following statements accurately describes differences in beta oxidation vs fatty acid biosynthesis? Check all that apply. Beta oxidation occurs in the matrix of the mitochondria and fatty acid synthesis occurs in the cytosol Electron carriers are needed in beta oxidation, yet no electron carriers are needed in fatty acid synthesis Carbon source for fatty acid synthase is tagged by ACP vs beta oxidation that uses CoA Beta oxidation utilizes electrons whereas fatty acid biosynthesis generates electrons
In between glycolysis and citric acid cycle ATP made: 2 ATP. NADH made: 6 NADH. Pyruvic acid IS converted to a form the citric acid eycle This produces dioxide and molecules of carbon molecules of acetic acid. Acetic acid then combines with Coenzyme A to make Acetyl CoA I
If you added an inhibitor of succinyl CoA synthetase to a cell actively undergoing the citric acid cycle, which of the following would be a direct and immediate result? O glucose would be produced O high energy triphosphate would not be formed via substrate level phosphorylation the delta G of the reaction would be reduced O CoA would not be added to fumarate Please don't provide handwriting solution
glucose Glycolysis (e). This waste product is made when oxygen picks up electrons and protons: Krebs Cycle Possible answers (not all will be used): alcohol ATP oxygen pyruvate (a). Four of these energy-rich molecules are produced in glycolysis: Pyruvate carbon dioxide water Mitochondria WADH glucose FADH ΑΤΡ (b). Glucose is split into two 3-carbon chains called AcetylCoEnzymeA in order to enter the Krebs Cycle. (c). The waste product (a gas) produced in the Krebs Cycle: Carbon dioxide (d). 32 of these energy-rich molecules are made in the ETC: Electron Transport Chain which are converted into lactic acid Paramecium Parlor