Question 1

In electron transport, which respiratory complex is NOT involved in the flow of electrons from FADH2?

Accepted Answer

A) complex III 
B) complex I 
C) complex II 
D) complex IV 
E) All of the above 
A) complex III 
B) complex I 
C) complex II 
D) complex IV 
E) All of the above

Question 2

During which of the following steps of the TCA cycle does substrate- level phosphorylation take place?

Accepted Answer

A) TCA- 3 
B) TCA- 2 
C) TCA- 4 
D) TCA- 6 
E) TCA- 5 
A) TCA- 3 
B) TCA- 2 
C) TCA- 4 
D) TCA- 6 
E) TCA- 5

Question 3

Of the following sequences, which shows the correct molecules through which electrons flow when delivered to the electron transport system by NADH?

Accepted Answer

A) complex I, coenzyme Q, complex III, complex IV, oxygen 
B) complex I, coenzyme Q, complex IV, cytochrome c, oxygen 
C) complex II, coenzyme Q, complex III, complex IV, oxygen 
D) complex I, cytochrome c, complex III, coenzyme Q, complex IV, oxygen 
E) complex I, coenzyme Q, complex III, cytochrome c, complex IV, oxygen 
A) complex I, coenzyme Q, complex III, complex IV, oxygen 
B) complex I, coenzyme Q, complex IV, cytochrome c, oxygen 
C) complex II, coenzyme Q, complex III, complex IV, oxygen 
D) complex I, cytochrome c, complex III, coenzyme Q, complex IV, oxygen 
E) complex I, coenzyme Q, complex III, cytochrome c, complex IV, oxygen

Question 4

The overall efficiency of aerobic respiration in eukaryotes is about

Accepted Answer

A) 10%. 
B) 75%. 
C) 25%. 
D) 100%. 
E) 55%. 
A) 10%. 
B) 75%. 
C) 25%. 
D) 100%. 
E) 55%.

Question 5

In electron transport, which respiratory complex is NOT involved in the flow of electrons from NADH?

Accepted Answer

A) complex IV 
B) complex I 
C) complex III 
D) complex II 
E) all of the above 
A) complex IV 
B) complex I 
C) complex III 
D) complex II 
E) all of the above

Question 6

Which of the following statements is NOT true of the TCA cycle?

Accepted Answer

A) Acetate enters the TCA cycle and joins a four- carbon acceptor molecule to form citrate. 
B) Decarboxylation occurs at two locations in the TCA cycle. 
C) FAD is an electron acceptor in the cycle. 
D) ATP/GTP is generated at one point by substrate- level phosphorylation. 
E) Oxidation occurs at three steps in the TCA cycle. 
A) Acetate enters the TCA cycle and joins a four- carbon acceptor molecule to form citrate. 
B) Decarboxylation occurs at two locations in the TCA cycle. 
C) FAD is an electron acceptor in the cycle. 
D) ATP/GTP is generated at one point by substrate- level phosphorylation. 
E) Oxidation occurs at three steps in the TCA cycle.

Question 7

Pyruvate dehydrogenase is regulated by all EXCEPT

Accepted Answer

A) AMP. 
B) ATP. 
C) CO₂. 
D) NADH. 
E) acetyl CoA. 
A) AMP. 
B) ATP. 
C) CO₂. 
D) NADH. 
E) acetyl CoA.

Question 8

The TCA cycle and glyoxylate cycle are similar in many respects. Which of the following statements accurately describes these cycles?

Accepted Answer

A) The glyoxylate cycle has only a single decarboxylating reaction. 
B) The glyoxylate cycle is used by some organisms to synthesize proteins. 
C) The TCA and glyoxylate cycles both occur in the mitochondrion. 
D) Both cycles are catabolic in function. 
E) In the glyoxylate cycle, two acetyl CoA molecules are used to generate succinate. 
A) The glyoxylate cycle has only a single decarboxylating reaction. 
B) The glyoxylate cycle is used by some organisms to synthesize proteins. 
C) The TCA and glyoxylate cycles both occur in the mitochondrion. 
D) Both cycles are catabolic in function. 
E) In the glyoxylate cycle, two acetyl CoA molecules are used to generate succinate.

Question 9

Which of the following is NOT a product of the TCA cycle?

Accepted Answer

A) NADH 
B) ATP 
C) acetyl CoA 
D) carbon dioxide (CO₂) 
E) FADH2 
A) NADH 
B) ATP 
C) acetyl CoA 
D) carbon dioxide (CO₂) 
E) FADH2

Question 10

fi- oxidation

Accepted Answer

A) is a process used to oxidize fatty acids. 
B) is a process used to digest some polysaccharides. 
C) is the second step in the oxidation of glucose. 
D) occurs in the cytoplasm. 
E) both B and C 
A) is a process used to oxidize fatty acids. 
B) is a process used to digest some polysaccharides. 
C) is the second step in the oxidation of glucose. 
D) occurs in the cytoplasm. 
E) both B and C

Question 11

When utilizing fats as an energy source, the glycerol portion enters _, when it has been converted to .

Accepted Answer

A) TCA cycle; pyruvate 
B) electron transport; CoQ 
C) glycolysis; fructose- 6- phosphate 
D) glycolysis; dihydroxyacetone phosphate 
E) TCA cycle; acetyl CoA 
A) TCA cycle; pyruvate 
B) electron transport; CoQ 
C) glycolysis; fructose- 6- phosphate 
D) glycolysis; dihydroxyacetone phosphate 
E) TCA cycle; acetyl CoA

Question 12

According to your text, in which of the following steps of the TCA cycle is NADH/FADH2 NOT produced?

Accepted Answer

A) TCA- 8 
B) TCA- 4 
C) TCA- 6 
D) TCA- 2 
E) TCA- 3 
A) TCA- 8 
B) TCA- 4 
C) TCA- 6 
D) TCA- 2 
E) TCA- 3

Question 13

Of the following enzymes associated with the TCA cycle, which of the following enzymes is NOT under allosteric regulation?

Accepted Answer

A) malate dehydrogenase 
B) pyruvate dehydrogenase complex 
C) isocitrate dehydrogenase 
D) a- ketoglutarate dehydrogenase 
E) fumarate hydratase 
A) malate dehydrogenase 
B) pyruvate dehydrogenase complex 
C) isocitrate dehydrogenase 
D) a- ketoglutarate dehydrogenase 
E) fumarate hydratase

Question 14

Which molecule is incorrectly matched with the number of carbon atoms it possesses?

Accepted Answer

A) isocitrate- 6 
B) citrate- 6 
C) malate- 5 
D) acetyl CoA- 2 
E) alpha ketoglutarate- 5 
A) isocitrate- 6 
B) citrate- 6 
C) malate- 5 
D) acetyl CoA- 2 
E) alpha ketoglutarate- 5

In electron transport, which respiratory complex is NOT involved in the flow of electrons from FADH2?

During which of the following steps of the TCA cycle does substrate- level phosphorylation take place?

Of the following sequences, which shows the correct molecules through which electrons flow when delivered to the electron transport system by NADH?

The overall efficiency of aerobic respiration in eukaryotes is about

In electron transport, which respiratory complex is NOT involved in the flow of electrons from NADH?

Which of the following statements is NOT true of the TCA cycle?

Pyruvate dehydrogenase is regulated by all EXCEPT

The TCA cycle and glyoxylate cycle are similar in many respects. Which of the following statements accurately describes these cycles?

Which of the following is NOT a product of the TCA cycle?

fi- oxidation

When utilizing fats as an energy source, the glycerol portion enters _, when it has been converted to .

According to your text, in which of the following steps of the TCA cycle is NADH/FADH2 NOT produced?

Of the following enzymes associated with the TCA cycle, which of the following enzymes is NOT under allosteric regulation?

Which molecule is incorrectly matched with the number of carbon atoms it possesses?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: The Flow of Energy in the Cell

Enzymes: The Catalysts of Life

Membranes: Their Structure, Function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Ii Messengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesion, Cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, Chromosomes, and the Nucleus

The Cell Cycle, Dna Replication, and Mitosis

Sexual Reproduction, Meiosis, and Genetic Recombination

Gene Expression: I the Genetic Code and Transcription

Gene Expression: II Protein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

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Exam 10: Chemotrophic Energy Metabolism: Aerobic Respiration

In electron transport, which respiratory complex is NOT involved in the flow of electrons from FADH2?

During which of the following steps of the TCA cycle does substrate- level phosphorylation take place?

Of the following sequences, which shows the correct molecules through which electrons flow when delivered to the electron transport system by NADH?

The overall efficiency of aerobic respiration in eukaryotes is about

In electron transport, which respiratory complex is NOT involved in the flow of electrons from NADH?

Which of the following statements is NOT true of the TCA cycle?

Pyruvate dehydrogenase is regulated by all EXCEPT

The TCA cycle and glyoxylate cycle are similar in many respects. Which of the following statements accurately describes these cycles?

Which of the following is NOT a product of the TCA cycle?

fi- oxidation

When utilizing fats as an energy source, the glycerol portion enters _, when it has been converted to .

According to your text, in which of the following steps of the TCA cycle is NADH/FADH2 NOT produced?

Of the following enzymes associated with the TCA cycle, which of the following enzymes is NOT under allosteric regulation?

Which molecule is incorrectly matched with the number of carbon atoms it possesses?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: The Flow of Energy in the Cell

Enzymes: The Catalysts of Life

Membranes: Their Structure, Function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Ii Messengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesion, Cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, Chromosomes, and the Nucleus

The Cell Cycle, Dna Replication, and Mitosis

Sexual Reproduction, Meiosis, and Genetic Recombination

Gene Expression: I the Genetic Code and Transcription

Gene Expression: II Protein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters