Uge 6
gas vesicles
Contains compounds that aid in buoyancy
Chromosome
Contains genetic information required for survival
storage granules
Contains high-molecular weight polymers
Nearly all bacteria contain peptidoglycan. Review the structure of peptidoglycan by selecting the correct characteristics.
Polymer of alternating N-acetylglucosamine (NAG) and N-acetylmurmaic (NAM). Contains D-amino acids not found in proteins.
Most known microorganisms maintain their internal pH
near neutral (pH 7).
The cell wall of Gram-negative bacterial cells is external to the _____
plasma membrane.
endospore
A thick-walled protective spore that forms inside a bacterial cell and resists harsh conditions.
plasmid
Extrachromosomal DNA molecules
Cytoskeleton
Involved in cell division and controlling cell shape
Ribosome
Involved in protein synthesis
The bacterial flagellum moves ______
by rotation that is powered by the proton motive force
Semiconservative replication of DNA means
each DNA made contains one old strand and one new strand of DNA.
gram positive and gram negative bacteria
gram positive - thick cell wall make of peptidoglycan and NO outer membrane, blue-purple color gram-negative - thin cell wall made up of peptidoglycan WITH outer membrane, red-pink color
A rod with the same S/V ratio as a cocci can have ____________ uptake across its cytoplasmic membrane than the cocci.
greater nutrient
Epulopiscium fishelsoni has a ____________ plasma membrane to increase its S/V ratio to compensate for its large size.
highly convoluted
A cocci with the same volume as a rod has a____ S/V ratio than does the rod.
lower
In bacteria, as the surface area-to-volume ratio increases, nutrient uptake becomes
more efficient
In addition, there is an _______external to the Gram-negative bacterial peptidoglycan layer.
outer membrane
This structure contains only a thin layer of _______
peptidoglycan
The two layer cell wall of Gram-negative bacteria is separated from the plasma membrane by the______
periplasmic space
