Which of the following pathways would be considered stage 3 catabolism? (Choose all correctanswers).GlycolysisOxidation of fatty acids to release acetyl CoAPentose phosphate pathwayElectron transport coupled to oxidative phosphorylation.Digestion by hydrolysis of peptide bonds of proteins to release amino acidsCitric acid cycle Which of the following are characteristics of enzyme regulation by modulatorsinteracting covalently with enzymes? (Choose all correct answers)Phosphorylation of the enzyme glycogen phosphorylaseAllosteric regulationAMP (positive effector) activation of phosphofructokinaseFeedback inhibitionZymogen activation

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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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Breakdown of fatty acids for energy produces two-carbon fragments that are converted to acetyl CoA molecules. How would these molecules be metabolized in aerobic cellular respiration? They would directly enter the energy-yielding phase of glycolysis. They would directly enter the electron transport chain. They would directly enter the citric acid cycle. They would be fermented in the cytoplasm. They would be converted to pyruvate and then undergo pyruvate oxidation upon transport into mitochondria.
Aerobic respiration in eukaryotes produces less ATP per glucose molecule than aerobic respiration in prokaryotes. This is because: the electrons from cytoplasmic NADH in eukaryotes are shuttled to ubiquinone instead of NADH dehydrogenase. prokaryotes can produce a larger proton gradient across the inner mitochondrial membrane, thus causing a greater driving force for ATP synthesis. fermentation and the tricarboxylic acid cycle can run simultaneously in prokaryotes, generating two additional ATP per glucose molecule. eukaryotes must actively transport glucose into the mitochondria where respiration А. B. C. D. occurs. prokaryotes can generate 2.5 ATP per FADH2 molecule, whereas eukaryotes can only generate 1.5 per FADH2 Е. E.
Which is both an input and an output of a metabolic pathway? Acetyl-CoA Oxaloacetate Citrate GTP
The metabolic function of the pentose phosphate pathway is: act as a source of ADP biosynthesis provide intermediates for the citric acid cycle. generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids. O participate in oxidation-reduction reactions during the formation of H2O.
Metabolism processes that generate fadh2 are select all that apply beta oxidation gluconeogenesis fatty acid synthesis glycolysis krebs cycle pdh eelctron transport chain
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
Which statement is TRUE regarding the glycolytic pathway? It includes five phosphate transfer reactions. All of the enzymes that are regulated by product inhibition. It includes reactions catalyzed by three isomerase enzymes. All of the enzymes are regulated by high ATP concentratrion
What must pyruvic acid be converted to before it can enter the citric acid cycle? lactic acid citric acid acetyl CoA ethyl alcohol
Which of the following is not a catabolic fate for pyruvate formed in glycolysis? fermentation to ethanol substrate for glycogen synthesis fermentatiom to lactate substrate for citric acid cycle
Below is an image showing how cellular respiration is regulated. Imagine someone ingested a toxin that prevents pyruvate from entering the mitochondria. Which of the following statements is true? Inhibits ATP Glucose GLYCOLYSIS Copyright 2018 Pearson Canada Inc. Fructose 6-phosphate Phosphofructokinase Fructose 1,6-bisphosphate Pyruvate Acetyl COA CITRIC ACID CYCLE Oxidative phosphorylation AMP I Stimulates Inhibits Citrate The amount of citrate in the cell would decrease, leading to a decrease in the activity of phosphofructokinse. The amount of citrate in the cell would increase, leading to a decrease in the activity of phosphofructokinse. The amount of citrate in the cell would decrease, leading to an increase in the activity of phosphofructokinse. The amount of citrate in the cell would increase, leading to an increase in the activity of phosphofructokinse.
You are studying energy production and metabolic activities of prostate cancer cells in the lab. You compare energy metabolism in these cancer cells with normal cells. Which of the following would you observe? Select all that apply Oxidative phosphorylation is reduced in cancer cells compared to normal cells Glycolysis is reduced in cancer cells compared to normal cells Oxidative phosphorylation is enhanced in cancer cells compared to normal cells Glycolysis is enhanced in cancer cells compared to normal cells
If TWO acetyl CoA enter the citric acid cycle, for each glucose we started with, then how many of each product listed below do we get. _____ ATP _____ NADH _____FADH2 _____ CO2

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