MBIO 3401 Exam final zhang ttu Latest Update
2025-2026 Exam 700+ Questions with 100%
Verified Correct Answers Guaranteed A+
_______ have retinal-associated light-driven
membrane ion pumps. - CORRECT ANSWER: Haloarchaea (proteohodopsin)-a
homolog of the retinal protein
_______ is a symbiotic relationship where one
partner benefits while the other is neither positively
nor negatively affected. - CORRECT ANSWER: Commensalism
_______ prevent transcription, whereas ________ stimulates transcription. - CORRECT
ANSWER: Repressors; activators
_______ refers to the description of distinct
life-forms and their organization into
different categories with shared traits. - CORRECT ANSWER: Taxonomy
__________ results in a loss of genes encoding for unselected traits. - CORRECT
ANSWER: Reductive evolution
1 glucose using *ethanolic* fermentation makes - CORRECT ANSWER: 2 ethanol and 2
CO2
1 glucose using *hetero*lactic fermentation makes - CORRECT ANSWER: 1 lactic acid,
1 ethanol, and 1 CO2
,1 glucose using *homo*lactic fermentation makes - CORRECT ANSWER: 2 lactic acid
1 glucose using *mixed acid* fermentation makes - CORRECT ANSWER:
acetate,formate,lactate,succinate, ethanol, H2, and CO2
1.Schizogony
2.Gamogony - CORRECT ANSWER: 1.mitotic reproduction of a haploid.
2. differentiation into male and female parts.
1st step of gram stain - CORRECT ANSWER: CV
2nd step of gram stain - CORRECT ANSWER: iodine
3 main catabolic breakdowns - CORRECT ANSWER: respiration, fermentation,
photoheterotrophy
3rd step of gram stain - CORRECT ANSWER: decolorizer
4th step of gram stain - CORRECT ANSWER: safrinin
A bacterial phylum is a group of organisms that
share a common ancestor that diverged early
from other bacteria, which is based on - CORRECT ANSWER: 16S ribosomal RNA
sequences
A bacterium capable of producing methane and water from carbon dioxide and
hydrogen performs a type of metabolism called _______ and, given its sources of
electrons, it is a _________. - CORRECT ANSWER: methanogenesis; chemolithotroph
,a bacterium tolerates a pH range of 3-10. this represetns ______ difference in h+ ion [] -
CORRECT ANSWER: 10,000,00 fold
A derivative F plasmid that contains host DNA is called an... - CORRECT ANSWER: F'
plasmid
A loss-of-function mutation could NOT be caused by... - CORRECT ANSWER: silent
mutation
A modest level of ethanol enters the human circulation naturally from _______,
equivalent to a fraction of a drink per day. - CORRECT ANSWER: intestinal flora
A scientist has given you a culture of a microbe that is an extreme thermophile and is an
obligate anaerobe. It does not produce methane and will not grow under high salt
conditions or in very acidic conditions. What group does this organism most likely
belong to? - CORRECT ANSWER: Crenarchaeota
a type of microscope that exposes specimen to UV, violet, or blue light and froms and
image with the light emitted at a different wavelength - CORRECT ANSWER:
fluorescence
A type of Telomerase is found in - CORRECT ANSWER: Streptomyces
A.Filamentous Cyanobacteria (Anabaena spp.)
B. Bacillus (Bacillus Subtilis)
C.Actinomycetes (Streptomyces spp.)
D. Myxobacteria (Myxococcus xanthus) - CORRECT ANSWER: A.Form chains by
SERIAL CELL DIVISION.
B. Assemble by attachment to a substrate. Then becomes a biofilm that secretes
antibiotics.
C. Undergo cell programmed death.
, D. Assemble by chemotaxis of swarmer cells.
ABC transporter - CORRECT ANSWER: hydrolyzes ATP into ADP plus proteins.
changes shape so that it can bind to nutrient, pops outside of cell. how cells develop
resistance
ABC transporters statements - CORRECT ANSWER: require energy, used for imports
and export, largest family of transporters
acetyl-coa is a carbon ___ molecule - CORRECT ANSWER: 2
acid fast stain - CORRECT ANSWER: carbolfuschion to stain mycobacterium species
Acidobacteria - CORRECT ANSWER: -deep-branching gram negative
-are abundant in soils, where they metabolize many organic substrates using diverse
electron acceptors
-many species grow in extreme conditions such as acid and metal contamination
-other grow at high temperature (such as isolate K22)
acidophiles - CORRECT ANSWER: ph 0-5. able to do this by keeping intracellular pH
neutral
Actinobacteria - CORRECT ANSWER: -generally weird Gram-positives
-mycelin formers
Streptomyces
-obligate aerobes
-have linear chromosomes with telomeres
-form mycelia that fragment into smaller cells called arthrospores
2025-2026 Exam 700+ Questions with 100%
Verified Correct Answers Guaranteed A+
_______ have retinal-associated light-driven
membrane ion pumps. - CORRECT ANSWER: Haloarchaea (proteohodopsin)-a
homolog of the retinal protein
_______ is a symbiotic relationship where one
partner benefits while the other is neither positively
nor negatively affected. - CORRECT ANSWER: Commensalism
_______ prevent transcription, whereas ________ stimulates transcription. - CORRECT
ANSWER: Repressors; activators
_______ refers to the description of distinct
life-forms and their organization into
different categories with shared traits. - CORRECT ANSWER: Taxonomy
__________ results in a loss of genes encoding for unselected traits. - CORRECT
ANSWER: Reductive evolution
1 glucose using *ethanolic* fermentation makes - CORRECT ANSWER: 2 ethanol and 2
CO2
1 glucose using *hetero*lactic fermentation makes - CORRECT ANSWER: 1 lactic acid,
1 ethanol, and 1 CO2
,1 glucose using *homo*lactic fermentation makes - CORRECT ANSWER: 2 lactic acid
1 glucose using *mixed acid* fermentation makes - CORRECT ANSWER:
acetate,formate,lactate,succinate, ethanol, H2, and CO2
1.Schizogony
2.Gamogony - CORRECT ANSWER: 1.mitotic reproduction of a haploid.
2. differentiation into male and female parts.
1st step of gram stain - CORRECT ANSWER: CV
2nd step of gram stain - CORRECT ANSWER: iodine
3 main catabolic breakdowns - CORRECT ANSWER: respiration, fermentation,
photoheterotrophy
3rd step of gram stain - CORRECT ANSWER: decolorizer
4th step of gram stain - CORRECT ANSWER: safrinin
A bacterial phylum is a group of organisms that
share a common ancestor that diverged early
from other bacteria, which is based on - CORRECT ANSWER: 16S ribosomal RNA
sequences
A bacterium capable of producing methane and water from carbon dioxide and
hydrogen performs a type of metabolism called _______ and, given its sources of
electrons, it is a _________. - CORRECT ANSWER: methanogenesis; chemolithotroph
,a bacterium tolerates a pH range of 3-10. this represetns ______ difference in h+ ion [] -
CORRECT ANSWER: 10,000,00 fold
A derivative F plasmid that contains host DNA is called an... - CORRECT ANSWER: F'
plasmid
A loss-of-function mutation could NOT be caused by... - CORRECT ANSWER: silent
mutation
A modest level of ethanol enters the human circulation naturally from _______,
equivalent to a fraction of a drink per day. - CORRECT ANSWER: intestinal flora
A scientist has given you a culture of a microbe that is an extreme thermophile and is an
obligate anaerobe. It does not produce methane and will not grow under high salt
conditions or in very acidic conditions. What group does this organism most likely
belong to? - CORRECT ANSWER: Crenarchaeota
a type of microscope that exposes specimen to UV, violet, or blue light and froms and
image with the light emitted at a different wavelength - CORRECT ANSWER:
fluorescence
A type of Telomerase is found in - CORRECT ANSWER: Streptomyces
A.Filamentous Cyanobacteria (Anabaena spp.)
B. Bacillus (Bacillus Subtilis)
C.Actinomycetes (Streptomyces spp.)
D. Myxobacteria (Myxococcus xanthus) - CORRECT ANSWER: A.Form chains by
SERIAL CELL DIVISION.
B. Assemble by attachment to a substrate. Then becomes a biofilm that secretes
antibiotics.
C. Undergo cell programmed death.
, D. Assemble by chemotaxis of swarmer cells.
ABC transporter - CORRECT ANSWER: hydrolyzes ATP into ADP plus proteins.
changes shape so that it can bind to nutrient, pops outside of cell. how cells develop
resistance
ABC transporters statements - CORRECT ANSWER: require energy, used for imports
and export, largest family of transporters
acetyl-coa is a carbon ___ molecule - CORRECT ANSWER: 2
acid fast stain - CORRECT ANSWER: carbolfuschion to stain mycobacterium species
Acidobacteria - CORRECT ANSWER: -deep-branching gram negative
-are abundant in soils, where they metabolize many organic substrates using diverse
electron acceptors
-many species grow in extreme conditions such as acid and metal contamination
-other grow at high temperature (such as isolate K22)
acidophiles - CORRECT ANSWER: ph 0-5. able to do this by keeping intracellular pH
neutral
Actinobacteria - CORRECT ANSWER: -generally weird Gram-positives
-mycelin formers
Streptomyces
-obligate aerobes
-have linear chromosomes with telomeres
-form mycelia that fragment into smaller cells called arthrospores
