TCU Dr Jones Microbiology Final
Exam Questions And Correct
Answers
prokaryotic cell with a rod shape
bacillus
spherical bacterial cell
coccus
spiral shaped bacteria
vibrios, spirilla, spirochete
Other shapes of bacterial cells
square, appendage, star-shaped, filamentous
,Structure and organization are based on specific processes cells need to carry
out:
Sensing/responding to stimuli, Compartmentation of metabolism, Growth and
reproduction
Bacterial Flagella
are long appendages Extending from the cell surface used for cell motility
Anatomy of a bacterial flagella
helical filament, a hook, and a basal body
chemotaxis
moving up the concentration gradient of a chemical attractant
Pili
are protein fibers extending from the surface of many bacteria
Pili help the cell...
Attach cells to surfaces and form biofilms and microcolonies
,conjugation pili are used to
transfer genetic material between cells
Glycocalyx
is an outer layer external to the cell wall that is an adhering layer of
polysaccharides (sometimes small proteins)
capsule
A thick glycocalyx bound to the cell
A slime layer
A thinner, diffuse layer of polysaccharides that protects cells from the
environment, and allows them to attach to surfaces
bacterial cell wall
a tough and protective external shell made of peptidoglycan
, The cell wall's functions
protects the cell from injury, and to maintain cell shape and water balance
Gram-Positive bacteria
have thick peptidoglycan cell walls containing teichoic acid
Gram-Negative bacteria
have a 2-dimensional peptidoglycan layer and no teichoic acid
Has an outer membrane, separated from the cell membrane by the...
periplasmic space
porins
in outer membrane, selectively allow small molecules into the periplasmic space
represents the interface between the cell environment and the cell cytoplasm
The cell membrane
Exam Questions And Correct
Answers
prokaryotic cell with a rod shape
bacillus
spherical bacterial cell
coccus
spiral shaped bacteria
vibrios, spirilla, spirochete
Other shapes of bacterial cells
square, appendage, star-shaped, filamentous
,Structure and organization are based on specific processes cells need to carry
out:
Sensing/responding to stimuli, Compartmentation of metabolism, Growth and
reproduction
Bacterial Flagella
are long appendages Extending from the cell surface used for cell motility
Anatomy of a bacterial flagella
helical filament, a hook, and a basal body
chemotaxis
moving up the concentration gradient of a chemical attractant
Pili
are protein fibers extending from the surface of many bacteria
Pili help the cell...
Attach cells to surfaces and form biofilms and microcolonies
,conjugation pili are used to
transfer genetic material between cells
Glycocalyx
is an outer layer external to the cell wall that is an adhering layer of
polysaccharides (sometimes small proteins)
capsule
A thick glycocalyx bound to the cell
A slime layer
A thinner, diffuse layer of polysaccharides that protects cells from the
environment, and allows them to attach to surfaces
bacterial cell wall
a tough and protective external shell made of peptidoglycan
, The cell wall's functions
protects the cell from injury, and to maintain cell shape and water balance
Gram-Positive bacteria
have thick peptidoglycan cell walls containing teichoic acid
Gram-Negative bacteria
have a 2-dimensional peptidoglycan layer and no teichoic acid
Has an outer membrane, separated from the cell membrane by the...
periplasmic space
porins
in outer membrane, selectively allow small molecules into the periplasmic space
represents the interface between the cell environment and the cell cytoplasm
The cell membrane
