Bacterial Surface Proteins Functions Quiz

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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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