Explain why a transcription factor must have at least two functional domains
What will be an ideal response?
Transcription factors are modular proteins with at least two functional domains: one binds to DNA in promoters and enhancers, and the other activates transcription.
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A pollen grain in a plant represents the ________
A. male gametophyte B. female gametophyte C. male sporophyte D. female sporophyte
Four of the five answers listed below are macronutrients. Select the exception
a. phosphorus b. sulfur c. nitrogen d. copper e. magnesium
The name “virus” is appropriate because it is derived
from Latin meaning a. small. b. powerful. c. poison. d. dangerous. e. disease.
Postzygotic isolation barriers prevent
A. a hybrid embryo from developing into a fertile adult. B. fertilization. C. male gametes from joining with female gametes. D. All answers are correct. E. formation of gametes by one of the parents.