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Cellular Respiration Quiz: Identifying Metabolic Pathways and Intermediates, Study notes of Cell Biology

A quiz consisting of 12 multiple-choice questions designed to test the understanding of cellular respiration concepts, including metabolic pathways, intermediates, and electron transport. Questions cover topics such as anabolic and catabolic pathways, the role of oxygen, and the sequence of electron flow in the respiratory chain.

Typology: Study notes

2021/2022

Uploaded on 09/12/2022

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1)
What is the term for metabolic pathways that release stored energy by breaking down complex molecules?
A)
anabolic pathways
B)
catabolic pathways
C)
thermodynamic pathways
D)
bioenergetic pathways
2)
Which of the following statements describes the results of this reaction?
C6H12O6 + 6 O2 โ†’ 6 CO2 + 6 H2O + Energy
A)
C6H12O6 is oxidized and O2 is reduced.
B)
O2 is oxidized and H2O is reduced.
C)
CO2 is reduced and O2 is oxidized.
D)
C6H12O6 is reduced and CO2 is oxidized.
3)
Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the
removal of a carbon (CO2) from one molecule of pyruvate?
A)
lactate
B)
glyceraldehydes-3-phosphate
C)
oxaloacetate
D)
acetyl CoA
E)
citrate
4)
Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
A)
glycolysis and the oxidation of pyruvate to acetyl CoA
B)
oxidation of pyruvate to acetyl CoA and the citric acid cycle
C)
the citric acid cycle and oxidative phosphorylation
D)
oxidative phosphorylation and fermentation
5)
Where are the proteins of the electron transport chain located?
A)
cytosol
B)
mitochondrial outer membrane
C)
mitochondrial inner membrane
D)
mitochondrial intermembrane space
E)
mitochondrial matrix
6)
Energy released by the electron transport chain is used to pump H+
into which location in eukaryotic cells?
A)
cytosol
B)
mitochondrial outer membrane
C)
mitochondrial inner membrane
D)
mitochondrial intermembrane space
E)
mitochondrial matrix
7)
Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon
dioxide (CO2) and water?
A)
glycolysis
B)
oxidation of pyruvate to acetyl CoA
C)
citric acid cycle
D)
oxidative phosphorylation (chemiosmosis)
pf2

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  1. What is the term for metabolic pathways that release stored energy by breaking down complex molecules?

A) anabolic pathways B) catabolic pathways

C) thermodynamic pathways D) bioenergetic pathways

  1. Which of the following statements describes the results of this reaction?

C

H

O

+ 6 O

โ†’ 6 CO

+ 6 H

O + Energy

A) C

H

O

is oxidized and O 2

is reduced. B) O 2

is oxidized and H 2

O is reduced.

C) CO

is reduced and O 2

is oxidized. D) C 6

H

O

is reduced and CO 2

is oxidized.

  1. Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the

removal of a carbon (CO 2

) from one molecule of pyruvate?

A) lactate

B) glyceraldehydes- 3 - phosphate

C) oxaloacetate

D) acetyl CoA

E) citrate

  1. Carbon dioxide (CO 2

) is released during which of the following stages of cellular respiration?

A) glycolysis and the oxidation of pyruvate to acetyl CoA

B) oxidation of pyruvate to acetyl CoA and the citric acid cycle

C) the citric acid cycle and oxidative phosphorylation

D) oxidative phosphorylation and fermentation

  1. Where are the proteins of the electron transport chain located?

A) cytosol

B) mitochondrial outer membrane

C) mitochondrial inner membrane

D) mitochondrial intermembrane space

E) mitochondrial matrix

  1. Energy released by the electron transport chain is used to pump H

into which location in eukaryotic cells?

A) cytosol

B) mitochondrial outer membrane

C) mitochondrial inner membrane

D) mitochondrial intermembrane space

E) mitochondrial matrix

  1. Which of the following produces the most ATP when glucose (C 6

H

O

) is completely oxidized to carbon

dioxide (CO 2

) and water?

A) glycolysis B) oxidation of pyruvate to acetyl CoA

C) citric acid cycle D) oxidative phosphorylation (chemiosmosis)

  1. Which metabolic pathway is common to both cellular respiration and fermentation?

A) the oxidation of pyruvate to acetyl CoA

B) the citric acid cycle

C) oxidative phosphorylation

D) glycolysis

E) chemiosmosis

Challenging questions

  1. When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the

intermembrane space, the result is the

A) formation of ATP. B) reduction of NAD

C) creation of a proton-motive force. D) lowering of pH in the mitochondrial matrix.

  1. The primary role of oxygen in cellular respiration is to

A) yield energy in the form of ATP as it is passed down the respiratory chain.

B) act as an acceptor for electrons and hydrogen, forming water.

C) combine with carbon, forming CO 2

D) catalyze the reactions of glycolysis.

  1. During aerobic respiration, electrons travel downhill in which sequence?

A) food โ†’ citric acid cycle โ†’ ATP โ†’ NAD

B) food โ†’ NADH โ†’ electron transport chain โ†’ oxygen

C) glucose โ†’ pyruvate โ†’ ATP โ†’ oxygen

D) glucose โ†’ ATP โ†’ electron transport chain โ†’ NADH

E) food โ†’ glycolysis โ†’ citric acid cycle โ†’ NADH โ†’ ATP

  1. Which of the following statements describes NAD

A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle.

B) NAD

has more chemical energy than NADH.

C) NAD

is oxidized by the action of hydrogenases.

D) NAD

can donate electrons for use in oxidative phosphorylation.