Transcription factors appear to be important molecules relating to the regulation of gene activity. In eukaryotes, two general classes or transcription factors exist. Briefly describe each
What will be an ideal response?
One class assembles at promoter regions adjacent to the site of transcription. The other class binds at more distant regions (enhancers and silencers).
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Gliding motility can be used to propel bacteria ________.
A. along the framework of the cytoskeleton of host cells B. through the air only C. through liquids only D. across solid substrates only
Which of the following exert bottom-up control?
A. parasites. B. predators. C. roots. D. parasites, predators, and roots. E. None of the answers is correct.
The scientist(s) who used an enzyme to destroy proteins to show that protein was not the genetic information transferred by bacteria was/were
A. Avery and Macleod. B. Watson and Crick. C. Griffith. D. Hershey and Chase. E. Wilkins and Franklin.
If all of the hydrogen bonds in a DNA molecule were
to break, a. the nucleotide base pairs would separate from each other. b. base pairing would not be affected. c. the phosphate groups would separate from the deoxyribose sugars. d. the deoxyribose sugars would separate from the nitrogen-containing bases. e. the molecule would unwind, but the two strands would stay together.