Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 7, Problem 5U
What is the role of NAD+ in the process of
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
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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
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 fermentation
What are NADH and FADH2?
a.
Oxidized coenzymes which carry electrons
b.
energy-producing organelles
c.
short-term, socially popular sources of hydrogen gas
d.
Reduced coenzymes which carry electrons
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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- What fundamental difference sets apart anaerobic respiration from aerobic respiration? a. Anaerobic respiration does not have Krebs Cycle. b. Anaerobic respiration does not have an electron transport chain. c. Anaerobic respiration involves substrate-level phosphorylation only. d. Anaerobic respiration utilizes electronegative compounds such as nitrates as final electron acceptor.arrow_forwardwhat is the transmembrane protein responsible for ATP synthesis during both photosynthesis and cellular respiration? a. Na+/K+ ATPase b. SGLUT-1 c. ATP synthase d. carbonic anhydrase e. rubiscoarrow_forwardIn the citric acid cycle, isocitrate is oxidatively decarboxylated by the enzyme isocitrate dehydrogenase to yield? a. Alpha-ketoglutarate, CO2 and NAD+ O b. Alpha-ketoglutarate, CO2 and GTP O c. Alpha-ketoglutarate and CO2 O d. Alpha-ketoglutarate, CO2 and NADHarrow_forward
- 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.arrow_forwardWhich of these statements is true? a.Glycolysis is the process that builds glucose. b. Cellular respiration requires light to complete the process c. Lactic acid fermentation provides energy when oxygen is present. d. Carbon dioxide is produced during respiration.arrow_forwardHow would a ubiquinone inhibitor directly affect the ATP yield? a. By increasing the electron transport rate to a fraction of 1/2 b. By limiting the hydrogen protons pumped to a fraction of 1/4 c. By pumping additional hydrogen protons to a fraction of 1/2 d. By disabling the entire electron transport chain and chemiosmotic systemarrow_forward
- What must pyruvate be converted to before it can enter the citric acid cycle? A. NADH B. lactic acid C. ethyl alcohol D. 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_forwardThe FADH2 formed during the Krebs cycle enters the electrontransport system at which site?a. NADH dehydrogenase b. complex II c. complex IV d. ATP synthasearrow_forward
- Under conditions where cellular ATP levels are high the rate of electron transport in mitochondria slows down. This is referred to as “respiratory control” What is the mechanism behind respiratory control? A. A high pH gradient slows proton pumping, which in turn slows electron transport. B. Glucose binds to the ATP synthase complex slowing the rate of diffusion of protons across the membrane. C. Molecules of UQ within the membrane change shape, which slows their rate of diffusion. D. ATP binds to NADH dehydrogenase complex (Complex 1) slowing the rate of NADH oxidation.arrow_forwardWhich process does not generate CO2? A. the citric acid cycle B. the conversion of pyruvate to lactic acid C. the conversion of pyruvate to acetyl-CoA D. the conversion of pyruvate to ethanolarrow_forwardGlucose is converted to pyruvate in which stage of cellular respiration? a. glycolysis b. intermediate stage c. citric acid cycle d. electron transport systemarrow_forward
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