MICROBIOLOGY REVIEWED EXAM
QUESTIONS AND ANSWERS FOR
REVISION
1) Which of the following compounds is not an enzyme?
A) Dehydrogenase
B) Cellulase
C) Coenzyme A
D) β-galactosidase
E) None of the above
C) Coenzyme A
3) Which organism is not correctly matched to its energy
source?
A) Photoheterotroph light
B) Photoautotroph CO2
C) Chemoautotroph Fe2+
D) Chemoheterotroph glucose
E) Chemoautotroph NH3
B) Photoautotroph CO2
4) How many molecules of ATP can be generated from the
complete oxidation of glucose to CO 2 and H2O?
A) 2
B) 4
C) 34
,D) 38
E) 76
D) 38
5) Which of the following is not true about anaerobic
respiration?
A) It involves glycolysis only.
B) It involves the Krebs cycle.
C) It involves the reduction of nitrate.
D) It generates ATP.
E) It requires cytochromes.
A) It involves glycolysis only.
7) What is the fate of pyruvic acid in an organism that uses
aerobic respiration?
A) It is reduced to lactic acid.
B) It is oxidized in the Krebs cycle.
C) It is oxidized in the electron transport chain.
D) It is catabolized in glycolysis.
E) It is reduced in the Krebs cycle.
B) It is oxidized in the Krebs cycle.
10) Fatty acids are catabolized in
A) The Krebs cycle.
B) The electron transport chain.
C) Glycolysis.
D) The pentose phosphate pathway.
E) The Entner Doudoroff pathway.
,A) The Krebs cycle.
12) According to the chemiosmotic mechanism, ATP is
generated when
A) Electrons are transferred between carrier molecules.
B) A high-energy phosphate group is transferred from an
intermediate metabolite to ADP.
C) Chlorophyll liberates an electron.
D) Protons are moved across a membrane.
E) Cells lyse in a hypotonic environment.
D) Protons are moved across a membrane.
13) Which of the following is the best definition of oxidative
phosphorylation?
A) Electrons are passed through a series of carriers to O2.
B) The energy released as carrier molecules are oxidized is
used to generate ATP.
C) The energy released in the reduction of carrier molecules is
used to generate ATP.
D) The transfer of a high-energy phosphate group to ADP.
B) The energy released as carrier molecules are oxidized is used
to generate ATP.
14) All the following are true about substrate-level
phosphorylation except
A) It involves the direct transfer of a high-energy phosphate
group from an intermediate
metabolic compound to ADP.
, B) No final electron acceptor is required.
C) It occurs in glycolysis.
D) The oxidation of intermediate metabolic compounds
releases energy that is used to
generate ATP.
E) All of the above are true.
D) The oxidation of intermediate metabolic compounds releases
energy that is used to
generate ATP.
15) Which of the following is not true about
photophosphorylation?
A) Light liberates an electron from chlorophyll.
B) The oxidation of carrier molecules releases energy.
C) Energy from oxidation reactions is used to generate ATP
from ADP.
D) It requires CO2.
E) It occurs in photosynthesizing cells.
D) It requires CO2.
16) Which of the following is not an end-product of
fermentation?
A) Lactic acid
B) Ethyl alcohol
C) Glycerol
D) Pyruvic acid
E) Acetone
QUESTIONS AND ANSWERS FOR
REVISION
1) Which of the following compounds is not an enzyme?
A) Dehydrogenase
B) Cellulase
C) Coenzyme A
D) β-galactosidase
E) None of the above
C) Coenzyme A
3) Which organism is not correctly matched to its energy
source?
A) Photoheterotroph light
B) Photoautotroph CO2
C) Chemoautotroph Fe2+
D) Chemoheterotroph glucose
E) Chemoautotroph NH3
B) Photoautotroph CO2
4) How many molecules of ATP can be generated from the
complete oxidation of glucose to CO 2 and H2O?
A) 2
B) 4
C) 34
,D) 38
E) 76
D) 38
5) Which of the following is not true about anaerobic
respiration?
A) It involves glycolysis only.
B) It involves the Krebs cycle.
C) It involves the reduction of nitrate.
D) It generates ATP.
E) It requires cytochromes.
A) It involves glycolysis only.
7) What is the fate of pyruvic acid in an organism that uses
aerobic respiration?
A) It is reduced to lactic acid.
B) It is oxidized in the Krebs cycle.
C) It is oxidized in the electron transport chain.
D) It is catabolized in glycolysis.
E) It is reduced in the Krebs cycle.
B) It is oxidized in the Krebs cycle.
10) Fatty acids are catabolized in
A) The Krebs cycle.
B) The electron transport chain.
C) Glycolysis.
D) The pentose phosphate pathway.
E) The Entner Doudoroff pathway.
,A) The Krebs cycle.
12) According to the chemiosmotic mechanism, ATP is
generated when
A) Electrons are transferred between carrier molecules.
B) A high-energy phosphate group is transferred from an
intermediate metabolite to ADP.
C) Chlorophyll liberates an electron.
D) Protons are moved across a membrane.
E) Cells lyse in a hypotonic environment.
D) Protons are moved across a membrane.
13) Which of the following is the best definition of oxidative
phosphorylation?
A) Electrons are passed through a series of carriers to O2.
B) The energy released as carrier molecules are oxidized is
used to generate ATP.
C) The energy released in the reduction of carrier molecules is
used to generate ATP.
D) The transfer of a high-energy phosphate group to ADP.
B) The energy released as carrier molecules are oxidized is used
to generate ATP.
14) All the following are true about substrate-level
phosphorylation except
A) It involves the direct transfer of a high-energy phosphate
group from an intermediate
metabolic compound to ADP.
, B) No final electron acceptor is required.
C) It occurs in glycolysis.
D) The oxidation of intermediate metabolic compounds
releases energy that is used to
generate ATP.
E) All of the above are true.
D) The oxidation of intermediate metabolic compounds releases
energy that is used to
generate ATP.
15) Which of the following is not true about
photophosphorylation?
A) Light liberates an electron from chlorophyll.
B) The oxidation of carrier molecules releases energy.
C) Energy from oxidation reactions is used to generate ATP
from ADP.
D) It requires CO2.
E) It occurs in photosynthesizing cells.
D) It requires CO2.
16) Which of the following is not an end-product of
fermentation?
A) Lactic acid
B) Ethyl alcohol
C) Glycerol
D) Pyruvic acid
E) Acetone
