The ability of some bacteria to resist the cytotoxic effects of macrophages is most likely due to which of the following?
A)they have high levels of flavohemoglobin that allows for the destruction of nitric oxide, a potent cytotoxic compound produced by macrophages
B)they possess a protein called cytoglobin that causes macrophages to undergo apoptosis
C)they have high levels of a myoglobin-like protein that tightly binds oxygen, preventing proper activity of the macrophage
D)they possess the protein neuroglobin which enables them to specifically target nerve cells and thus evade macrophages
E)none of the above

Question

Quizplus · Accepted Answer

Flavohemoglobin is known to allow for the destruction of nitric oxide, a cytotoxic compound produced by macrophages. B, C, and D are not correct as there is no evidence to suggest that cytoglobin or neuroglobin have any effect on macrophages, and myoglobin-like proteins would not interfere with the activity of macrophages. Therefore, the correct answer is A.

The Ability of Some Bacteria to Resist the Cytotoxic Effects