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BIOL 1105 chapter 26 with 100- correct answers(graded A+).
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BIOL 1105 chapter 26 with 100- correct answers(graded A+).
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BIOL 1105 chapter 26 with100% correct answers(graded
A+)
three ways prokaryotes take up DNA from environment - answer 1)
transformation
2) transduction
3) conjugation
transformation - answer the take-up of DNA from the environment
transduction - answer the viral transfer or DNA between microbes
conjugation - answer the transfer of genetic information by direct
cell-to-cell contact
plasmid - answer small, circular piece of DNA located in the
cytoplasm of many bacteria
conjugation tube - answer cytoplasmic connection between two
bacterial cells through which DNA passes during conjugation
True or False: Plasmids usually carry accessory genes that aren't
required for normal growth but can confer advantageous traits to a
bacterium such as antibiotic resistance. - answer true
True or False: Sometimes chromosomal DNA can be transferred to a
recipient cell if the plasmid DNA became incorporated into the
chromosomal DNA of the donor cell. - answer True
,True or False: Two common ways to organize groups of prokaryotes
are 1) based on what they look like (morphology) and 2) what type
of metabolism and chemical reactions they perform. - answer True
True or False: Prokaryotes come in a wide variety of sizes and
shapes. - answer True
True or False: Prokaryotes can be motile but some are not. - answer
True
spirillum - answer spiral shaped bacteria
coccus - answer round or sphere shaped bacteria
bacillus - answer rod shaped bacteria
strepto - answer chains of bacterial cells
staphylo - answer grape-like clusters of bacterial cells
diplo - answer bacteria arranged in pairs or groups of two
tetrad - answer bacteria arranged in groups of four
sarcina - answer bacteria arranged in groups of 8
flagella - answer a long, rotating filament that helps a bacterial cell
move
, True or False: All bacteria have at least one flagella. - answer False
True or False: Bacterial flagella move like a propeller helping the
bacteria to move. - answer True
True or False: Depending on the direction of flagellar rotation, the
bacterial cell either swims ahead or tumbles, which allows it to
change directions. - answer True
True or False: The cell walls are different in bacteria and archaea. -
answer True
peptidoglycan - answer found in the cell walls of bacteria
isoprene - answer found in the cell wall of archaea
Gram stain - answer a staining method that distinguishes between
two different kinds of bacterial cell walls
Gram positive - answer describing the group of bacteria that have
a cell wall that is structurally less complex and contains more
peptidoglycan than the cell wall of Gram-negative bacteria; stains
"purple" in the Gram stain
Gram negative - answer describing the group of bacteria that have
a cell wall that is structurally more complex and contains less
peptidoglycan than the cell wall of Gram-positive bacteria; stains
"pinkish/red" in the Gram stain
True or False: Bacteria range in size from almost as small as a virus
to over a billion times larger than the smallest. - answer True
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