Transcription factors that increase the rate of transcription by binding a target in the general transcriptional machi and an enhancer are known specifically as:
a. activator proteins.
b. leucine zipper proteins.
c. helix-turn-helix proteins.
d. zinc finger proteins.
e. lnc RNAs
a
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Which of the following is important in microscopy?
a. magnification b. lens length c. base height d. number of adjustment knobs
Which of the following is a function of the thymus?
a) production of red blood cells b) secretion of antibodies c) production and maintenance of stem cells d) site for the maturation of lymphocytes
The phenotypic sex depends most directly on
A. the presence of a Y chromosome. B. the presence of the number of active X chromosomes. C. the development of the ovaries. D. the influence of hormones. E. the degeneration of the Müllerian duct.
In order to support the hypothesis that two groups are different races, how often would unique alleles appear in one of the groups?
A) in one individual in the population B) in one family line of the population C) in a significant number of members in the population D) in all the members on the population