Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 9, Problem 4TYK
What is the primary function of the reactions that follow glycolysis in a fermentation pathway?
a. to regenerate NAD+ from NADH, so glycolysis can continue
b. to synthesize pyruvate from lactate
c. to regenerate NADH from NAD+, so electrons can be donated to the electron transport chain
d. to synthesize electron acceptors, so that
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What is the role of NAD+ in the process of cellular respiration?
a. It functions as an electron carrier.
b. It functions as an enzyme.
c. It is the final electron acceptor for anaerobic respiration.
d. It is a nucleotide source for the synthesis of ATP.
What is the importance of fermentation to cellular metabolism?
a. It generates glucose for the cell in the absence of O2.
b. It oxidizes NADH to NAD+ during electron transport.
c. It oxidizes NADH to NAD+ in the absence of O2.
d. It reduces NADH to NAD+ in the absence of O2.
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
Chapter 9 Solutions
Biological Science (6th Edition)
Ch. 9 - Where does the citric acid cycle occur in...Ch. 9 - 2. What does the chemiosmotic hypothesis claim?
a....Ch. 9 - 3. After glucose is fully oxidized by glycolysis,...Ch. 9 - 4. What is the primary function of the reactions...Ch. 9 - Compare and contrast substrate-level...Ch. 9 - If you were to expose cells that are undergoing...Ch. 9 - In step 3 of the citric acid cycle, the enzyme...Ch. 9 - 8. Explain the relationship between electron...Ch. 9 - 9. Cyanide (C=N–) blocks complex IV of the...Ch. 9 - QUANTITATIVE Early estimates suggested that the...
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- Which statement correctly describes carbon fixation? a. the conversion of CO2 to an organic compound b. the use of RUBISCO to form 3-PGA c. the production of carbohydrate molecules from G3P d. the formation of RuBP from G3P molecules e. the use of ATP and NADPH to reduce CO2arrow_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_forwardWhich statement is TRUE regarding the glycolytic pathway? a. It includes five phosphate transfer reactions. b. All of the enzymes that are regulated by product inhibition. c. It includes reactions catalyzed by three isomerase enzymes. d. All of the enzymes are regulated by high ATP concentratrionarrow_forward
- What 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_forwardWhich statement is true about the process of fermentation? In fermentation, O2 is a terminal acceptor of electrons During fermentation, pyruvate or a byproduct of pyruvate gets reduced During fermentation, pyruvate or a byproduct of pyruvate gets oxidized During fermentation, ATP is consumed Fermentation takes place in the mitochondrial matrixarrow_forward
- 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 ATParrow_forwardWhat is the main goal of lactic fermentation in humans especially during strenuous activity? a. Reduce FAD+ to FADH2 b. Reduce pyruvate to lactate c. Oxidize NADH to NAD+ d. Oxidize glucose to ethanolarrow_forwardGive specifics as to what happens to pyruvate in both fermentation pathways? What are all the products of both pathways?arrow_forward
- How will the cell shift its metabolic processes in response to the level of pyruvate and in order to produce ATP? A. It will shift from aerobic respiration to fermentation B. It will shift from aerobic respiration to anaerobic respiration C.It will continue with aerobic metabolism using oxygen in the cytosol to make ATP D. It will shift from anaerobic respiration to fermentationarrow_forwardWhat is the difference between cellular respiration and fermentation? Select an answer. a) cellular respiration does not need oxygen, while fermentation needs oxygen b) cellular respiration needs oxygen, while fermentation does not need oxygen c) cellular respiration produces very little energy, while fermentation produces a lot of energy d) Almost all cells carry out fermentation, while few carry out cellular respirationarrow_forwardWhat are the by-products of cellular respiration in animals? What are the by-products of photsynthesis in plants?arrow_forward
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