The drug herceptin (tratuzumab) functions by _____________
A. blocking signals between the external environment and the nucleus
B. reactivating ras proteins
C. blocking the methylation of histone proteins
D. stimulating the activity of DNA repair genes
E. switching off overactive proto-oncogenes
A
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Transpiration:a
declines in areas where forests have been cleared. b. is a relatively minor component of the global hydrological cycle. c. is a synonym for precipitation. d. is significant to climate issues, but only in relationship to tropical rainforests. e. does not occur in India due to the local geographic conditions and extent of ocean surface.
In humans red-green color blindness is a sex-linked recessive trait. If a man and a women produce a color-blind son, which of the following must be true?
A. The father is color-blind B. Both parents carry the allele for color blindness C. Neither parent carries the allele for color blindness D. The father carries the allele for color blindness E. The mother carries the allele for color blindness
The critical ________ is the most important limiting factor that determines where a species lives.
Fill in the blank(s) with the appropriate word(s).
Supercoiling in a single bacterial chromosomal domain is affected by
a. events only within that domain. b. supercoiling in one adjacent domain. c. supercoiling in both adjacent domains. d. supercoiling in one other nonadjacent domain. e. supercoiling in any other domain.