18 Questions
The outer membrane of the Gram-negative cell wall appears as a lipid bilayer about ____ nm thick.
7
The peptidoglycan portion of the Gram-negative cell wall is generally - nanometers (nm) thick.
2-3
The periplasm contains enzymes for ____ .
nutrient breakdown
____ enable the bacterium to adhere intimately to host cells and other surfaces.
Adhesins
____ A thin, inner wall composed of peptidoglycan.
Periplasm
Adhesins enable the bacterium to adhere intimately to host cells and other surfaces in order to ______, resist flushing, and resist phagocytic destruction.
colonize
____ Aiding certain bacteria in resisting phagocytic destruction.
Surface proteins
Invasins enable some bacteria to penetrate host cells by functioning as ______.
invasins
The outer membrane of the Gram-negative cell wall acts as a ______ and helps retain certain enzymes.
molecular sieve
The pores in the outer membrane of Gram-negative bacteria are composed of proteins called ______.
porins
Lipoproteins are embedded in the outer membrane and covalently bonded to the ______.
peptidoglycan
The periplasm of bacteria contains enzymes that ______ nutrients.
break down
The ______ forms the outermost layer of the cell wall
peptidoglycan
Lipoproteins are embedded in the outer membrane and covalently bonded to the ______
peptidoglycan
Phospholipids are located mainly in the inner layer of the outer membrane, with a lipid portion called lipid A embedded in the ______
membrane
Pore-forming proteins called ______ span the outer membrane
porins
The periplasm is the gelatinous material between the outer membrane and the ______ membrane
cytoplasmic
Surface proteins that differ with the strain and species of the bacterium are present in the ______
outer membrane
Test your knowledge on the functions of bacterial surface proteins, including adhesion, enzyme activity, resistance to phagocytosis, and invasion of host cells. Explore the role of periplasm in nutrient breakdown and other processes.
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