How are drug companies trying to combat the ability of the BCL-2 gene to lower the effectiveness of chemotherapy?
a) They are trying to develop drugs that cause cancer cells to revert to normal embryonic cells.
b) They are trying to develop drugs that stabilize cancer cells
c) They are trying to develop drugs that cause cancer cells to dedifferentiate.
d) They are trying to develop drugs that cause cancer cells to differentiate.
e) They are trying to develop drugs that make cancer cells more likely to undergo apoptosis.
Ans: e) They are trying to develop drugs that make cancer cells more likely to undergo apoptosis.
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A. barrier for separating extracellular and intracellular environments of a cell B. cell-to-cell adhesion C. selective transport D. ATP synthesis E. cell signaling
There are no infectious agents that can penetrate intact skin.
Answer the following statement true (T) or false (F)
Prop roots are more common in:
a. annuals. b. eudicots. c. monocots. d. epiphytes. e. parasitic plants.
As the size of a cell decreases, the ratio of its surface area to volume:
a. increases b. decreases c. stays the same