Which of the following statements best describes the role of NAD+/NADH in glycolysis? A) NADH is used to directly create the phosphoanhydride bonds in ATP. B) NADH is used primarily in substrate-level phosphorylation. C) NADH accepts electrons during fermentation. D) NAD+ accepts electrons. E) All of the above are correct.

Which of the following statements best describes the role of NAD+/NADH in glycolysis? A) NADH is used to directly create the phosphoanhydride bonds in ATP. B) NADH is used primarily in substrate-level phosphorylation. C) NADH accepts electrons during fermentation. D) NAD+ accepts electrons. E) All of the above are correct.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter4: How Cells Obtain Energy

Section: Chapter Questions

Problem 9RQ: What do the electrons added to NAD do? a. They become part of a fermentation pathway. b. They go to...

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Which of the following statements is correct? a. Glycolysis and Krebs cycle produce ATP in substrate level phosphorylation b. Glycolysis and Krebs cycle produce ATP in oxidative level phosphorylation. c. Glycolysis and pyruvate oxidation produce ATP in substrate level phosphorylation. d. Glycolysis and pyruvate oxidation produce ATP in oxidative level phosphorylation.
Which of the following statements is correct? A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle. B) NAD+ has more chemical energy than NADH. C) NAD+ is oxidized by the action of hydrogenases. D) NAD+ can donate electrons for use in oxidative phosphorylation. E) NAD+ is reduced during fermentation in order for glycolysis to continue.
What is the purpose of respiration? What are the inputs, products, and energy required or gained? How does it differ from fermentation? in other words, how do Glycolysis, Pyruvate dehydrogenase, Kreb cycle, and electron transport chain work and connect to the production of ATP by chemiosmosis? compare that to fermentation.
During the first step in the glycolysis pathway, hexokinase binds to glucose and converts it into glucose-6-phosphate. In this reaction, hexokinase is the _________ and glucose is its ____________. a) enzyme....substrate b) enzyme.....product c) product..... enzyme d)substrate.....enzyme e)substrate product
In which step of glycolysis does each of the following occurs? second substrate-level phosphorylation reaction first ATP-consuming reaction third isomerization reaction use of NAD+ as an OA
Which of the following is one difference between fermentation and anaerobic respiration? a. Fermentation uses oxygen to produce ATP and anaerobic respiration does not b. Fermentation harvests more energy from each sugar molecule than anaerobic respiration. c. Anaerobic respiration utilizes an electron transport chain while fermentation does not d. Anaerobic respiration utilizes glycolysis while fermentation does not.
Which of the following statements is TRUE? Select one: A. Lactic acid is a product of aerobic respiration; ethyl alcohol is a product of fermentation. B. Oxidation is the loss of electrons; reduction is the gain of electrons. C. Oxygen is a product of cellular respiration; carbon dioxide is a product of photosynthesis. D. Glucose is a product of aerobic respiration; lactic acid is a product of anaerobic respiration.
Which of the following events occurs during the energy-payoff phase of glycolysis? One carbon of a pyruvate molecule is oxidized to carbon dioxide. Oxaloacetate receives a two-carbon acetyl group from acetyl coenzyme A to form citrate. Substrate-level phosphorylation Oxidative Phosphorylation In which stage of aerobic cellular respiration are FADH2 molecules produced? Pyruvate Oxidation Glycolysis Krebs Cycle Electron Transport Which of the following events does not occur during pyruvate processing (pyruvate oxidation)? One carbon atom of each pyruvate is oxidized to carbon dioxide. NAD+ coenzyme is reduced to NADH. The remaining two carbon atoms of pyruvate (acetyl unit) reacts with coenzyme A to produce acetyl CoA. FAD coenzyme receives two hydrogen atoms to produce FADH2.
Which of the following statements summarizes glycolysis?O c. Consume 4 ATP and produces 2 ATP, 2 NADH and 2 pyruvatesO a. Consume 2 ATP and produces 2 ATP, 2 NADH and 2 pyruvatesO d. Consume 2 ATP and produces 4 ATP, 4 NADH and 2 pyruvatesO b. Consume 2 ATP and produces 4 ATP, 2 NADH and 2 pyruvates
Place the following steps of cellular respiration in the correct order by numbering them from 1 to 4. a. The Krebs cycle produces the energy carriers NADH, FADH2, and ATP. b. If oxygen levels are adequate, pyruvate is transported into the mitochondrion. If oxygen levels are very low, fermentation proceeds. c. Glucose is broken down to produce ATP and NADH. d. An electron transport chain produces ATP from ADP.
In the absence of oxygen, the primary purpose of fermentation is to: generate glucose for ATP synthesis generate alcohol for beverages regenerate NAD+ from NADH allowing glycolysis to continue produce amino acids for protein synthesis oxidize glucose to generate oxygen
Which of the following steps occurs during the payoff phase of glycolysis? A. the conversion of phosphoenolpyruvate to pyruvate B. the conversion of fructose 6-phosphate to fructose 1,6-biphosphate C. the conversion of glucose 6-phosphate to fructose 6-phosphate D. the conversion of glucose to glucose 6-phosphate