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23 Nov 2005, 06:35
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The rate at which cells in a Petri dish die when exposed to a given drug can depend on numerous factors. These variables affect different cells in different ways, and should, therefore, result in a random pattern of cell death. However, in many experiments the pattern of cell death is strikingly regular, with many cells dying at the same time.
Which of the following, if true, offers the best basis for a partial explanation of the patterned cell deaths?
(A) For any given drug, there is a level that is toxic enough to affect the majority of cells in the dish.
(B) Certain cells have weak membranes and are particularly susceptible to certain drugs.
(C) Some cells die because they cannot tolerate life in a Petri dish.
(D) Though science has made great technological advances, much of what goes on at the cellular level is unobservable to scientists.
(E) Cells which have certain characteristics are less prone to be killed by a drug.
Which of the following, if true, offers the best basis for a partial explanation of the patterned cell deaths?
(A) For any given drug, there is a level that is toxic enough to affect the majority of cells in the dish.
(B) Certain cells have weak membranes and are particularly susceptible to certain drugs.
(C) Some cells die because they cannot tolerate life in a Petri dish.
(D) Though science has made great technological advances, much of what goes on at the cellular level is unobservable to scientists.
(E) Cells which have certain characteristics are less prone to be killed by a drug.
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23 Nov 2005, 07:12
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I pick A.
Reason:
Passage says that despite different factors, a pattern is observed.
A says, that drugs affect majority of the cells at a threshold...so this partially explains the patten despite the randomness.
Reason:
Passage says that despite different factors, a pattern is observed.
A says, that drugs affect majority of the cells at a threshold...so this partially explains the patten despite the randomness.
