Compare and contrast positive and negative controls of gene expression in bacteria
What will be an ideal response?
Both forms of control result from an interaction of a molecule (usually considered to be a protein) with the genetic material (either RNA or DNA). Positive control results when the interaction stimulates transcription, whereas negative control occurs when the interaction inhibits transcription.
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Which of these organisms is NOT iteroparous?
A. humans B. oak trees C. bears D. dogs E. agave plants
How is the bond in F2 different from the bond in KCl?
A. F2 is covalent and KCl is ionic B. F2 is ionic and KCl is covalent C. F2 and KCl are both ionic
All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight. Depending on whether atoms satisfy the octet rule will predict
A. their radioactive energy. B. the chemical behavior of the atoms. C. whether they will be found in nature. D. whether they will dissolve in water.
A Petri dish containing isolated colonies of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa would be described as being
A) A mixed culture B) An axenic culture C) A pure culture D) A contaminated culture