Download Chapter 5 Active Lecture Questions

Active Lecture
Questions
Chapter 5
Microbial
Metabolism
Copyright © 2010 Pearson Education, Inc.
Which substance in the following reaction is
being reduced?
a. acetaldehyde
b. NADH
c. ethanol
d. NAD+
Which of the following reactions produces
the most molecules of ATP during aerobic
metabolism?
a.
b.
c.
d.
e.
glucose → glucose 6-phosphate
phosphoenolpyruvic acid → pyruvic acid
glucose → pyruvic acid
acetyl CoA → CO2 + H2O
succinic acid → fumaric acid
Which of the following processes does
NOT generate ATP?
a.
b.
c.
d.
e.
photophosphorylation
the Calvin-Benson cycle
oxidative phosphorylation
substrate-level phosphorylation
All of the above generate ATP.
Which of the following compounds has the
greatest amount of energy for a cell?
a.
b.
c.
d.
e.
CO2
O2
ATP
glucose
lactic acid
Which of the following is the best definition
of the Krebs cycle?
a. the oxidation of pyruvic acid
b. the way cells produce CO2
c. a series of chemical reactions in which NADH is
produced from the oxidation of pyruvic acid
d. a method of producing ATP by phosphorylating
ADP
e. a series of chemical reactions in which ATP is
produced from the oxidation of pyruvic acid
Which of the following is the best definition
of respiration?
a. a sequence of carrier molecules with O2 as the
final electron acceptor
b. a sequence of carrier molecules with an inorganic
molecule as the final electron acceptor
c. a method of generating ATP
d. the complete oxidation of glucose to CO2 and H2O
e. a series of reactions in which pyruvic acid is
oxidized to CO2 and H2O
Which culture produces the most lactic acid?
a. E. coli growing in glucose broth at 35°C with O2
for 5 days
b. E. coli growing in glucose broth at 35°C without O2
for 5 days
c. both a and b
d. neither a nor b
Which culture produces the most ATP?
a. E. coli growing in glucose broth at 35°C with O2
for 5 days
b. E. coli growing in glucose broth at 35°C without O2
for 5 days
c. both a and b
d. neither a nor b
Which culture uses NAD+?
a. E. coli growing in glucose broth at 35°C with O2
for 5 days
b. E. coli growing in glucose broth at 35°C without O2
for 5 days
c. both a and b
d. neither a nor b
Which culture uses the most glucose?
a. E. coli growing in glucose broth at 35°C with O2
for 5 days
b. E. coli growing in glucose broth at 35°C without O2
for 5 days
c. both a and b
d. neither a nor b
The enzyme-regulated energy-requiring
reactions are involved mostly in
a.
b.
c.
d.
catabolism.
anabolism.
photosynthesis.
oxidation.
What is the essential nutrient used by many
bacteria in the synthesis of the coenzyme
folic acid?
a.
b.
c.
d.
NADP
FAD
PABA
COA
Apoenzymes are inactive by themselves and
must be activated by
a.
b.
c.
d.
cofactors.
ATP.
holoenzymes.
substrates.
How many molecules of ATP can be
generated from the three phases in the
respiration of glucose?
a.
b.
c.
d.
2
4
34
38
Energy is released during a cell’s
a.
b.
c.
d.
reduction of glucose.
decarboxylation of glucose.
oxidation of glucose.
phosphorylation of glucose.
In which of the following is chemical energy
used for carbon fixation?
a.
b.
c.
d.
photosynthesis
Krebs cycle
fermentation
glycolysis
The energy from catabolic reactions is used
to produce
a.
b.
c.
d.
ADP.
ATP.
AMP.
phosphate.
The pentose phosphate pathway provides a
means to break down glucose and
a.
b.
c.
d.
five carbon sugars.
six carbon sugars.
lipids.
galactose.
In aerobic respiration, what is the fate of the
pyruvic acid produced in glycolysis?
a.
b.
c.
d.
It is catabolized in glycolysis.
It is reduced to lactic acid.
It is oxidized in the Krebs cycle.
It is oxidized in the electron transport chain.
Where does photosynthesis take place in
eukaryotic cells?
a.
b.
c.
d.
mitochondria
ribsomes
chloroplasts
lysosomes
In the Calvin-Benson cycle,
a.
b.
c.
d.
oxygen is used to synthesize sugars.
carbon dioxide is used to synthesize sugars.
ADP is formed.
light is required.
In cyclic photophosphorylation, the electrons
a.
b.
c.
d.
return to chlorophyll.
are incorporated in NADPH.
are converted to ATP.
are converted to glucose.
Fatty acids are catabolized in
a.
b.
c.
d.
glycolysis.
the electron transport chain.
the Krebs cycle.
the pentose phosphate pathway.
The light-independent (dark) reactions of
photosynthesis include:
a.
b.
c.
d.
fermentation
beta oxidation
Calvin-Benson cycle
carbon fixation
In lipid catabolism, glycerol is converted into
dihydroxyacetone phosphate and catabolized
via
a.
b.
c.
d.
beta oxidation.
the pentose phosphate pathway.
lactic acid fermentation.
glycolysis.