Some complement proteins form a membrane attack complex that
a. engulf an invador.
b. releases cytotoxic chemicals into an invador.
c. causes inflammation.
d. creates a pore in an invador causing the punctured cell to disintegrate.
e. protects invadors from cytotoxic chemicals.
D
You might also like to view...
Explain why one cell of a pathogenic bacterium by itself typically does not secrete a toxin, despite the species as a whole being characterized as toxin producing
To help in your explanation, predict what would happen to an individual pathogen that secreted a toxin inside a human. What will be an ideal response?
During the 1960s and 1970s, ecologists emphasized competition as the primary factor structuring communities
Indicate whether the statement is true or false.
Describe two ways that repressor mechanisms operate in antibiotic resistance; one way in which an inducer ligand (antibiotic) is transmitted directly into the cell, and one way in which an inducer is sensed on the cell surface and a signal is sent into the cell.
What will be an ideal response?
Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating
A) the bottleneck effect. B) stabilizing selection. C) frequency-dependent selection. D) neutral variation. E) disruptive selection.