How are the replicated bacterial chromosomes segregated during cell division?
What will be an ideal response?
Ans: It is likely that the two replicated daughter chromosomes are internally attached to the envelope, so that septum formation occurs between them and they are segregated when cell division occurs.
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T cell-target cell interactions induce specialized Tc cells to produce ________ that kill virus-infected target cells
A) perforins B) granulozymes C) leukocidins D) pyogens
Rickettsia rickettsii are readily phagocytized by macrophages.Why doesn't this control the infection and prevent the development of Rocky Mountain spotted fever?
A. The bacteria are toxic for T cells and prevent the development of cell-mediated immunity. B. The bacteria escape from the phagosome and reproduce in the cytoplasm of the phagocyte. C. The bacteria interfere with the development of antibodies. D. The bacteria are unable to inactivate complement.
The founder effect differs from a population bottleneck in that the founder effect ________
A) requires a small population B) is a type of natural selection C) can occur only on an oceanic island colony D) involves the isolation of a small colony of individuals from a larger population
Fermentation produces more ATP than does aerobic respiration.
Answer the following statement true (T) or false (F)