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The overall products of glycolysis are


A) ATP, NADH, pyruvate, and FADH2.
B) ATP and pyruvate only.
C) ATP, NADH, and acetyl CoA.
D) ATP, NADH, FADH2, and CO2.
E) ATP, NADH, and pyruvate.

F) B) and C)
G) All of the above

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Which kind of metabolic poison would interfere with the glycolysis stage of cellular respiration?


A) An agent that binds to lactate and inactivates it
B) An agent that reacts with oxygen and depletes its concentration in the cell
C) An agent that inhibits the formation of acetyl CoA
D) An agent that reacts with FADH2 and oxidizes FAD+
E) An agent that closely mimics the structure of glucose but is not capable of being metabolized and broken down

F) A) and B)
G) B) and C)

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What molecule is common to both C3 photosynthesis and the process of glycolysis?


A) G3P
B) NADPH
C) Fructose
D) Acetyl CoA
E) Pyruvate

F) C) and D)
G) A) and B)

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is a series of reactions, occurring under aerobic conditions, in which large amounts of ATP are produced from the breakdown of glucose.

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Cellular r...

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The inner membrane of the mitochondria can be compared functionally to the thylakoid membranes of the chloroplast because both contain a system for


A) glucose synthesis.
B) pyruvate production.
C) anaerobic respiration.
D) enzyme synthesis.
E) electron transport.

F) A) and B)
G) None of the above

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Which event occurs in the fluid portion of the cytoplasm of a cell undergoing glucose metabolism?


A) Acetyl CoA formation
B) Krebs cycle
C) Chemiosmosis
D) Glycolysis
E) Electron transport

F) A) and E)
G) B) and E)

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During glycolysis in the energy- investing stage, two ATP molecules are "spent" to convert glucose to the highly reactive molecule


A) fructose bisphosphate.
B) pyruvate.
C) FADH2.
D) glyceraldehyde 3- phosphate.
E) NADH.

F) B) and D)
G) A) and B)

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During which of the following processes is CO2 produced?


A) The ETC
B) The Krebs cycle
C) Glycolysis

D) A) and C)
E) A) and B)

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In the glucose activation stage of glycolysis, glucose receives a phosphate group from ATP. This reaction is


A) respiration.
B) endergonic.
C) exergonic.
D) fermentation.

E) A) and B)
F) A) and C)

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Glycolysis and the Krebs cycle reactions both occur in the mitochondria.

A) True
B) False

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Where does the production of pyruvate occur during glycolysis?


A) Intermembrane compartment
B) Mitochondrial matrix
C) Cytoplasmic fluid
D) Inner membrane
E) Ribosomes

F) A) and D)
G) B) and C)

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During which of the following processes is ATP NOT produced?


A) Glycolysis by itself
B) Fermentation by itself
C) Cellular respiration by itself

D) B) and C)
E) A) and C)

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The term chemiosmosis is associated with which process?


A) The Krebs cycle
B) The ETC
C) Glycolysis
D) Fermentation

E) B) and C)
F) None of the above

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The metabolic breakdown of one molecule of glucose generates the greatest amount of ATP energy during


A) glycolysis.
B) mitochondrial matrix reactions.
C) the Krebs cycle.
D) fermentation.
E) ETC.

F) A) and B)
G) All of the above

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Chemiosmosis in mitochondria directly results in the synthesis of


A) ATP.
B) H2O.
C) FADH2.
D) NADH.
E) acetyl CoA.

F) A) and B)
G) C) and D)

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If only one molecule of pyruvate (instead of two) were produced per glucose molecule metabolized in glycolysis, then which of the following would be produced after glycolysis and before the electron transport chain? If only one molecule of pyruvate (instead of two)  were produced per glucose molecule metabolized in glycolysis, then which of the following would be produced after glycolysis and before the electron transport chain?   A)  1 ATP, 3 NADH, and 1 FADH<sub>2</sub> B)  2 ATP, 6 NADH, and 2 FADH<sub>2</sub> C)  1 ATP, 4 NADH, and 1 FADH<sub>2</sub> D)  1 ATP, 1 NADH, and 1 FADH<sub>2</sub>


A) 1 ATP, 3 NADH, and 1 FADH2
B) 2 ATP, 6 NADH, and 2 FADH2
C) 1 ATP, 4 NADH, and 1 FADH2
D) 1 ATP, 1 NADH, and 1 FADH2

E) None of the above
F) C) and D)

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After fermentation in human cells, lactate is converted to pyruvate in the


A) heart.
B) muscles.
C) lungs.
D) bone marrow.
E) bloodstream.

F) A) and B)
G) C) and D)

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Most of the ATP produced during cellular respiration is generated in the mitochondrial after the movement of hydrogen ions through ATP- synthesizing proteins in the inner membrane of the mitochondrion.

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During cellular respiration, the pyruvate produced in glycolysis is


A) the source of electrons for NADH and FADH2.
B) broken down to O2 and hydrogen.
C) transported out of the mitochondria.
D) converted to lactate or ethanol.

E) B) and D)
F) A) and D)

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In the 1940s, some physicians prescribed low doses of a drug called dinitrophenol (DNP) to help patients lose weight. This unsafe drug was quickly abandoned after a few patients died. DNP affects cells by uncoupling the chemiosmotic machinery and making the inner mitochondrial membrane "leaky" to hydrogen ions. Explain how DNP caused weight loss and, ultimately, death in these dieters.

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No hydrogen ion gradient could be establ...

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