BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 7, Problem 7A
Summary Introduction
Saccharomyces cerevisiae, commonly known as yeast, is a eukaryotic organism that belongs to kingdom fungi. It is a single-celled microscopic organism. It is majorly used for fermentation processes post glycolysis, which leads to the production of ethanol along with carbon dioxide in anaerobic conditions.
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Why is it important to regenerate NAD+ during fermentation?a. It helps maintain the reactions of glycolysis.b. So that it can transfer an electron to the electron transport chainc. To maintain the concentration of pyruvate in a celld. To produce alcohol or lactic acid for the cell
During glycolysis, pyruvate oxidation, and the citric acid cycle, NADH is produced. The citric acid cycle also produces FADH2. What is the purpose of these molecules?
a. to produce carbon dioxide to breathe out
b. to produce oxygen that is needed for the electron transport chain
c. to carry electrons to the electron transport chain
d. to provide the ADP and phosphate that are needed to make ATP
the reaction catalyzed by glyceradehyde 3-phosphate dehydrigenase is based on NAD+ and a active site cysteine. Also another phosphate group is added. what is the reason for that?
a) because one ATP is consumed
b) an inorganic phosphate is activated for ATP synthesis
C) NADH can be recycld and than converted back to NAD+ for glycolysis
d) because one ATP is generated
Chapter 7 Solutions
BIOLOGY
Ch. 7.1 - Prob. 1LOCh. 7.1 - Explain the role of electron carriers in energy...Ch. 7.1 - Prob. 3LOCh. 7.2 - Prob. 1LOCh. 7.2 - Calculate the energy yield from glycolysis.Ch. 7.2 - Distinguish between aerobic respiration and...Ch. 7.3 - Prob. 1LOCh. 7.4 - Relate the nine reactions of the citric acid cycle...Ch. 7.4 - Diagram the oxidation reactions in the citric acid...Ch. 7.5 - Prob. 1LO
Ch. 7.5 - Prob. 2LOCh. 7.6 - Calculate the number of ATP molecules produced by...Ch. 7.7 - Prob. 1LOCh. 7.8 - Prob. 1LOCh. 7.8 - Distinguish between fermentation and anaerobic...Ch. 7.9 - Identify the entry points for proteins and fats in...Ch. 7.9 - Prob. 2LOCh. 7.10 - Prob. 1LOCh. 7 - Prob. 1DACh. 7 - Prob. 1UCh. 7 - Prob. 2UCh. 7 - Which of the following is NOT a product of...Ch. 7 - Glycolysis produces ATP by a. phosphorylating...Ch. 7 - What is the role of NAD+ in the process of...Ch. 7 - Prob. 6UCh. 7 - The electrons carried by NADH and FADH2 can be a....Ch. 7 - Prob. 1ACh. 7 - Prob. 2ACh. 7 - Prob. 3ACh. 7 - What is the importance of fermentation to cellular...Ch. 7 - Prob. 5ACh. 7 - A chemical agent that makes holes in the inner...Ch. 7 - Prob. 7ACh. 7 - Use the following table to outline the...Ch. 7 - Human babies and hibernating or cold-adapted...Ch. 7 - Recent data indicate a link between colder...
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- Which of the following statements is TRUE of the electron transport chain (ETC)? A. The movement of electrons down the ETC drives the formation of a proton (H+) gradient. B. The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC. C. The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase. D. The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the ETC.arrow_forwardA mutant algae has some of its mitochondria missing with inner mitochondrial membrane. Which of the following processed would be completely affected in these mitochondria? A. Electron transport chain B. Biosynthesis C. Glycolic D. Alcoholic fermentation 2. Which of the following cellular respiration processes can produce the most number of ATP per molecule of glucose oxidized? A. Alcoholic fermentation B. Lactic acid fermentation C. Aerobic respiration D. All produce an equal number of APPS.arrow_forwardWhy is there a difference in the ATP that is being produced by the NADH molecule coming from Glycolysis which could be 4-6 for 2 NADH molecules? a.The conversion of reduction of NAD+ to NADH is a highly energetic process. b.Glycolysis uses 2 ATP for the production of NADH. c.NADH molecules from Glycolysis is not energetic enough to produce the 3 ATP. d.It will be dependent on the pathway that the NADH will be undergoing.arrow_forward
- NAD+ is regenerated duringa. glycolysis.b. fermentation.c. the Krebs cycle.d. the formation of acetyl-CoA.arrow_forwardWhat is the direct mechanism of ATP synthesis during the electron transport phase of cellular respiration? (what is the potential energy source that drives ATP production?) b) Why is oxygen needed for this phase? c) What is the role of ATP synthasearrow_forwardIn aerobic respiration when is carbon dioxide produced? (a) when oxygen is used as the final electron acceptor in oxidative phosphorylation (b) glycolysis (c) during substrate level phosphorylation (d) Krebs cycle (e) when hydrogen is pumped across the inner membrane of the mitochondriaarrow_forward
- The oxygen (O2) consumed during aerobic cellular respiration is involved directly in which process or event? A) the phosphorylation of ADP to form ATP B)accepting electrons at the end of the electron transport chain C)glycolysis D)the oxidation of pyruvate to acetyl-CoA E)the citric acid cycle 12.arrow_forwardWhat Is The Main Purpose Of Oxygen In Cellular Respiration? A)Allowing For The Break Down Of Glucose In Pyruvate B)Suppling Electrons To The Electron Transport Chain C)Allowig For A Flow Of Electrons In The Electron Transport Chain D)Oxidation Of Pyruvate To Acetyl COAarrow_forwardOligomycin is a substance that prevents the ATP synthesis reaction in oxidative phosphorylation, and 2,4-dinitrophenol is an uncoupling agent. In the presence of oligomycin, what would be the effect of adding 2,4-dinitrophenol? A) O2 consumption will increase. B) Electron transfer will be blocked. C) Oxidative phosphorylation will occur. D) Production of water will decrease.arrow_forward
- Why are electron carriers (NAD+/NADH and FAD/FADH2) so important in the process of cellular respiration? A)NADH and FADH2 are major components of the ETC, so without them, there would be no ETC in the cell. B)They deliver electrons to the ETC, which in turn sets up chemiosmosis, where most of the ATP is generated. C)They separate the electrons from the protons so that the protons can be moved out of the mitochondrion. D)The electrons that they carry are able to directly phosphorylate ADP in order to generate the bulk of ATP in the cell. E) They transport protons across the mitochondrial membrane. 14.arrow_forwarda- Krebs cycle is the subsequent pathway of glycolysis. Although, pyruvate is the last product of glycolysis why the Krebs cycle does not initiate with pyruvate? b-Describe the roles of the NADH and FADH2 in glucose break down reactions.arrow_forwardCompare ATP production in the citric acid cycle to the electron transport chain, or aerobic respiration. A. Both processes use oxidative phosphorylation. B. Both processes use substrate-level phosphorylation. C. The citric acid cycle uses substrate-level phosphorylation, and the electron transport chain uses oxidative phosphorylation. D. The citric acid cycle uses oxidative phosphorylation, and the electron transport chain uses substrate-level phosphorylation.arrow_forward
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