C HAPTER 14: M ETABOLIC D IVERSITY OF
M ICROORGANISMS
Test Bank for Brock Biology of Micro organism 16th Edition by Michael T.
Madigan
14.1 Multiple Choice Questions
1. The metabolic diversit y of photosynthetic bacteria stems from different
A) bacteriochlorophylls and pigments they contain.
B) chlorophylls they can have and organic compounds they ca n produce.
C) light-harvesting complexes, electron donors, and organic compounds
they produce.
D) unrelated taxa capable of photosynthesis.
2. Whether an organism is classified as a photoheterotroph or a
photoautotroph depends on its
A) energy source.
B) carbon source.
C) oxygen requirements.
D) carbon and energy sources.
3. In photosynthesis, NADH and NADPH are produced from NAD + and
NADP+ by
A) oxidation reactions.
B) reduction reactions.
C) both oxidation and reduction reactions.
D) neither oxidation nor reduction reactions.
,4. Bacteriochlorophyll and chlorophyll contain _______ as a cofactor.
A) iron (II)
B) iron (III)
C) magnesium
D) manganese
5. Which of the following is NOT a role of carotenoids?
A) as accessory pigments
B) photoprotection
C) to produce singlet oxygen
D) to quench toxic ox ygen species
6. ʺSpecial pairʺis the name given to the in the photochemical complex of
the purple bacteria.
A) two bacteriochlorophyll a molecules
B) two bacteriochlorophyll b molecules
C) two quinones
D) two reaction centers
7. Which of the following are NOT found within the photosynthetic gene
cluster of Rhodobacter (a purple phototrophic bacterium)?
A) genes encoding reaction center and light -harvesting photocomplexes
B) genes encoding proteins involved in phycobiliprotein biosynth esis
C) genes encoding proteins involved in bacteriochlorophyll biosynthesis
D) genes encoding proteins involved in carotenoid biosynthesis
8. Proteomic anal ysis of a microbial communit y indicated an abundance of
phycobiliproteins. Which phototrophic group is l ikel y active and abundant
in this communit y?
A) cyanobacteria
B) eukaryotic phototrophs
C) green bacteria
, D) prochlorophytes
9. At some of the lowest light concentrations, _______ can still grow well
due to their _______, which effectivel y harvest photons for energ y.
A) green bacteria / antenna pigments
B) green bacteria / chlorosomes
C) purple bacteria / antenna pigments
D) purple bacteria / chlorosomes
10.Phycoerythrin is
A) the red phycobiliprotein.
B) the blue phycobiliprotein.
C) a t ype of carotenoid.
D) a green carotenoid.
11.Two separate photosystems involved in electron flow is a hallmark of
A) anox ygenic phototrophs.
B) green sulfur bacteria.
C) oxygenic phototrophs.
D) purple bacteria.
12.Anammox is an anaerobic process that generates energy from _______ and
forms N2.
A) ammonia
B) ammonium
C) ammonia and nitrate
D) ammonia and nitrite
13.What will happen to a cyanobacterium that has its photosystem II (PSII)
blocked?
A) Additional electron acceptors, such as NADP+, will be required to
oxidize ox ygen and overcome the lost PSII process.
M ICROORGANISMS
Test Bank for Brock Biology of Micro organism 16th Edition by Michael T.
Madigan
14.1 Multiple Choice Questions
1. The metabolic diversit y of photosynthetic bacteria stems from different
A) bacteriochlorophylls and pigments they contain.
B) chlorophylls they can have and organic compounds they ca n produce.
C) light-harvesting complexes, electron donors, and organic compounds
they produce.
D) unrelated taxa capable of photosynthesis.
2. Whether an organism is classified as a photoheterotroph or a
photoautotroph depends on its
A) energy source.
B) carbon source.
C) oxygen requirements.
D) carbon and energy sources.
3. In photosynthesis, NADH and NADPH are produced from NAD + and
NADP+ by
A) oxidation reactions.
B) reduction reactions.
C) both oxidation and reduction reactions.
D) neither oxidation nor reduction reactions.
,4. Bacteriochlorophyll and chlorophyll contain _______ as a cofactor.
A) iron (II)
B) iron (III)
C) magnesium
D) manganese
5. Which of the following is NOT a role of carotenoids?
A) as accessory pigments
B) photoprotection
C) to produce singlet oxygen
D) to quench toxic ox ygen species
6. ʺSpecial pairʺis the name given to the in the photochemical complex of
the purple bacteria.
A) two bacteriochlorophyll a molecules
B) two bacteriochlorophyll b molecules
C) two quinones
D) two reaction centers
7. Which of the following are NOT found within the photosynthetic gene
cluster of Rhodobacter (a purple phototrophic bacterium)?
A) genes encoding reaction center and light -harvesting photocomplexes
B) genes encoding proteins involved in phycobiliprotein biosynth esis
C) genes encoding proteins involved in bacteriochlorophyll biosynthesis
D) genes encoding proteins involved in carotenoid biosynthesis
8. Proteomic anal ysis of a microbial communit y indicated an abundance of
phycobiliproteins. Which phototrophic group is l ikel y active and abundant
in this communit y?
A) cyanobacteria
B) eukaryotic phototrophs
C) green bacteria
, D) prochlorophytes
9. At some of the lowest light concentrations, _______ can still grow well
due to their _______, which effectivel y harvest photons for energ y.
A) green bacteria / antenna pigments
B) green bacteria / chlorosomes
C) purple bacteria / antenna pigments
D) purple bacteria / chlorosomes
10.Phycoerythrin is
A) the red phycobiliprotein.
B) the blue phycobiliprotein.
C) a t ype of carotenoid.
D) a green carotenoid.
11.Two separate photosystems involved in electron flow is a hallmark of
A) anox ygenic phototrophs.
B) green sulfur bacteria.
C) oxygenic phototrophs.
D) purple bacteria.
12.Anammox is an anaerobic process that generates energy from _______ and
forms N2.
A) ammonia
B) ammonium
C) ammonia and nitrate
D) ammonia and nitrite
13.What will happen to a cyanobacterium that has its photosystem II (PSII)
blocked?
A) Additional electron acceptors, such as NADP+, will be required to
oxidize ox ygen and overcome the lost PSII process.
