Question

78. Most of the carbon in amino acid biosynthesis comes from A) citric acid cycle intermediates. B) citric acid cycle intermediates and glycolysis products. C) glycolysis products. D) glycolysis intermediates and products. 79. Which metabolic strategy does NOT use the proton motive force for ATP production? A) aerobic catabolism B) fermentation C) chemoorganotrophy D) photoautrophy 80. Chemoorganotrophy is a term describing microorganisms that A) use preformed organic compounds as a source of electrons and obtain energy through fermentations or organic respiration. B) obtain electrons and H+ via photolysis of H2O or H2S, producing O2 or S2, respectively. C) perform photolysis of small organic molecules. D) use carbon dioxide as the carbon source. E) pull electrons off minerals to donate to electron transport systems 81. In many bacteria, the electron carrier _ is used for biosynthesis, whereas _ feeds the electron transport system. A) NADPH; NADH B) FADH2; NADPH C) NADH; acetyl-S-CoA D) chlorophyll; NADPH E) pyruvate; acetyl-S-CoA 82. The enzyme pyruvate kinase catalyzes the conversion of phosphoenolpyruvate to pyruvate; the phosphate group is transferred to ADP to form ATP. This reaction is an example of A) ATP synthesis by substrate-level phosphorylation. B) the use of a proton concentration gradient by [H+]-ATPases to synthesize ATP. C) ATP coupled to FADH2 oxidation. D) a P-Type ATPase activity. E) oxidative phosphorylation. 83. Fatty acids enter the TCA cycle after being degraded to what molecule? A) acetyl-phosphate B) malonyl-S-CoA C) acetyl-S-CoA D) citrate E) pyruvate 84. Which of the following is NOT an end product of fermentation? A) carbon dioxide B) acetone C) pyruvate D) butanol E) propionate

          78. Most of the carbon in amino acid biosynthesis comes from
A) citric acid cycle intermediates.
B) citric acid cycle intermediates and glycolysis products.
C) glycolysis products.
D) glycolysis intermediates and products.

79. Which metabolic strategy does NOT use the proton motive force for ATP production?
A) aerobic catabolism
B) fermentation
C) chemoorganotrophy
D) photoautrophy

80. Chemoorganotrophy is a term describing microorganisms that
A) use preformed organic compounds as a source of electrons and obtain energy through fermentations or organic respiration.
B) obtain electrons and H+ via photolysis of H2O or H2S, producing O2 or S2, respectively.
C) perform photolysis of small organic molecules.
D) use carbon dioxide as the carbon source.
E) pull electrons off minerals to donate to electron transport systems

81. In many bacteria, the electron carrier _______ is used for biosynthesis, whereas _______
feeds the electron transport system.
A) NADPH; NADH
B) FADH2; NADPH
C) NADH; acetyl-S-CoA
D) chlorophyll; NADPH
E) pyruvate; acetyl-S-CoA

82. The enzyme pyruvate kinase catalyzes the conversion of phosphoenolpyruvate to pyruvate;
the phosphate group is transferred to ADP to form ATP. This reaction is an example of
A) ATP synthesis by substrate-level phosphorylation.
B) the use of a proton concentration gradient by [H+]-ATPases to synthesize ATP.
C) ATP coupled to FADH2 oxidation.
D) a P-Type ATPase activity.
E) oxidative phosphorylation.

83. Fatty acids enter the TCA cycle after being degraded to what molecule?
A) acetyl-phosphate
B) malonyl-S-CoA
C) acetyl-S-CoA
D) citrate
E) pyruvate

84. Which of the following is NOT an end product of fermentation?
A) carbon dioxide
B) acetone
C) pyruvate
D) butanol
E) propionate

78. Most of the carbon in amino acid biosynthesis comes from
A) citric acid cycle intermediates.
B) citric acid cycle intermediates and glycolysis products.
C) glycolysis products.
D) glycolysis intermediates and products.

79. Which metabolic strategy does NOT use the proton motive force for ATP production?
A) aerobic catabolism
B) fermentation
C) chemoorganotrophy
D) photoautrophy

80. Chemoorganotrophy is a term describing microorganisms that
A) use preformed organic compounds as a source of electrons and obtain energy through fermentations or organic respiration.
B) obtain electrons and H+ via photolysis of H2O or H2S, producing O2 or S2, respectively.
C) perform photolysis of small organic molecules.
D) use carbon dioxide as the carbon source.
E) pull electrons off minerals to donate to electron transport systems

81. In many bacteria, the electron carrier is used for biosynthesis, whereas
feeds the electron transport system.
A) NADPH; NADH
B) FADH2; NADPH
C) NADH; acetyl-S-CoA
D) chlorophyll; NADPH
E) pyruvate; acetyl-S-CoA

82. The enzyme pyruvate kinase catalyzes the conversion of phosphoenolpyruvate to pyruvate;
the phosphate group is transferred to ADP to form ATP. This reaction is an example of
A) ATP synthesis by substrate-level phosphorylation.
B) the use of a proton concentration gradient by [H+]-ATPases to synthesize ATP.
C) ATP coupled to FADH2 oxidation.
D) a P-Type ATPase activity.
E) oxidative phosphorylation.

83. Fatty acids enter the TCA cycle after being degraded to what molecule?
A) acetyl-phosphate
B) malonyl-S-CoA
C) acetyl-S-CoA
D) citrate
E) pyruvate

84. Which of the following is NOT an end product of fermentation?
A) carbon dioxide
B) acetone
C) pyruvate
D) butanol
E) propionate

Added by David U.

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