Proto-oncogenes operate in healthy cells
1.True
2.False
1
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Transcriptionally active genes are characterized by:
A. an increase in H1. B. the presence of bound nucleosomes at the promoter regions. C. the presence of specialized chromosome remodeling complexes. D. the absence of histone variants such as H2AZ and H3.3. E. All of these choices are correct.
During stressful situations, epinephrine initiates ____
a. dilation of blood vessels to the skin b. dilation of blood vessels to the heart c. constriction of blood vessels to the brain d. a decrease in metabolic rate e. a decrease in blood glucose levels
Which type of cell functions to help control immune responses in the skin?
a. melanocytes b. Granstein cells c. keratinocytes d. Langerhans cells e. pigmented cells
Speciation events that occur when the geographic ranges of the populations involved overlap are termed ________
Fill in the blank(s) with correct word