You are studying the affects of transcription factors on the activation of gene expression. However, when first starting your study, you notice that some of the transcription factors bind further away from the DNA that it is aiming to transcribe. What description best explains this?
A. The transcription factor transcribes small RNAs that then bind to the promoter and activate the gene's expression.
B. The assistance of RNA looping moves the transcription factor closer to the promoter.
C. DNA looping transports the transcription factor closer to the promoter and initiates gene transcription.
D. Signals originate via inducers from the transcription factor to the site of promotion that activate transcription of the gene.
Answer: C
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Some major changes that occurred in horse body size, foot anatomy and tooth morphology are hypothesized to be due to natural selection because of ...
A. changes in global climates which resulted in changing environments from forest to grasslands. B. changes in global climates which resulted in changing environments from grasslands to forests. C. changing climates from dry to wet. D. changing climates from wet to dry. E. increase in reproduction of larger animals due to lack of water in the dry environment.
DNA replication is considered semiconservative because
A. it uses one old strand as a template for the synthesis of a new strand. B. it never replicates in the 5' to 3' prime direction. C. it always replicates in the 3' to 5' prime direction. D. it will create three new identical strands when finished.
In an ecosystem, which measure of energy is the largest in amount or rate?
a. net primary productivity b. gross primary productivity c. plant respiration d. animal respiration e. plant and animal respiration combined
The reservoir for Orientia tsutsugamushi is (humans/mites/rodents)
What will be an ideal response?