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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Similar questions

The high energy electrons that are stripped off acetyl CoA in _________are taken to the electron transport chain. As they move through the electron transport chain, these high energy electrons are pulled to lower and lower energy levels, finally combining with ________, chemiosmotic phosphorylation; oxygen the fermentation pathways; carbon dioxide ATP synthase; nitrogen the citric acid cycle; oxygen
If the alpha-ketoacid product from the transaminase reaction that uses alanine and alpha-ketoglutarate as substrates goes on to make glucose via the __________ pathway, then the amino acid carbon skeleton is considered to be __________. ANSWER citric acid cycle; ketogenic glycogen synthesis; ketogenic glycolysis; glucogenic gluconeogenesis; glucogenic
For each of the following molecules determine how much ATP would be net from aerobic cellular respiration. Show your work. Which of the following produces the most energy? (a) Triglycerides are first digested into glycerol and fatty acids. The catabolism of this triglyceride yields: 1 DHAP molecule, 15 FADH2, 15 NADH, and 18 acetyl- COA. (b) Proteins are first digested into individual amino acids. Deamination removes the amine group from each amino acid. The resulting catabolism produces 12 pyruvate molecules.
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.
Which one of the following statements about PEP (phosphoenolpyruvate) synthesis is correct? Pyruvate can be converted to PEP by a combination of reactions that use energy from two different types of nucleotide triphosphate Pyruvate can be converted to PEP by pyruvate kinase via a single reaction. Pyruvate can be converted to PEP by a mutase. Pyruvate is converted to PEP by the citric acid cycle.
A high concentration of which of the following would activate the citric acid cycle? ADP ATP Acetyl CoA NADH Alanine
Which of these processes is most exergonic? (Think VERY carefully!) Dephosphorylation of glucose Conversion of enol to keto Oxidation of an aldehyde to a carboxylic acid group. ATP hydrolysis
Which stage of aerobic respiration requires an input of oxygen? Acetyl-CoA formation Citric acid cycle Glycolysis Electron transfer phosphorylation
All of the following statements about glucose are true except: Glucose is metabolized in the cytoplasm of prokaryotic organisms. On a low-carb diet, keto acids from glucogenic amino acids will be used to synthesize glucose. Glucose is metabolized in the mitochondria of mature red blood cells. Under non-starvation conditions, the brain relies exclusively on glucose as its fuel source.
Which of the following is true about aerobic and anaerobic metabolism? the citric acid cycle happens faster in aerobic metabolism than it does in anaerobic metabolism oxidative phosphorylation in anaerobic metabolism requires more steps than aerobic metabolism glycolysis is the first step of both aerobic and anaerobic metabolism electron transport chain produces more CO2 in anaerobic metabolism than it does in aerobic metabolism chemiosmosis occurs more frequently in anaerobic metabolism than it does in aerobic metabolism
Which of the following doesn’t occur in the transition reaction? Pyruvic acid is oxidized Pyruvic acid is decarboxylated Pyruvic acid is reduced Acetic acid attaches to coenzyme A to form Acetyl CoA
Many factors influence the regulation of aerobic catabolism in biological cells, culminating in oxidative phosphorylation. Based on your understanding of "metabolic logic", which of the following molecules would encourage or favor catabolism? OA. ATP OB. NADH Oc. acetyl-CoA OD. ADP O E. citrate

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