When turns are removed from a closed-circular DNA, the DNA may become:
A. overwound and supercoils will result.
B. underwound and supercoils will result.
C. underwound or overwound, depending on the sequence of the DNA.
D underwound, but this form is unstable and typically reverts to the relaxed state.
E. overwound, but this form is unstable and typically reverts to the relaxed state.
B
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Combinatorial control is a general principle for the regulation of gene transcription and is observed in many stages of development in all multicellular organisms
A. true B. false
__________ is a diagnostic tool that reveals missing or extra chromosomes and some structural changes in an
individual's chromosomes. Fill in the blank(s) with the appropriate word(s).
The ________ reflex can be considered the body's first line of defense against hemorrhage-induced low blood pressure.
What will be an ideal response?
When plasmids are used to produce a desired protein
A) the plasmids are inserted into the bacterial chromosome. B) the plasmids multiply and produce the protein outside of the bacterium. C) the desired gene is inserted into the plasmid, and the plasmid is returned to the bacterium by transformation. D) the bacterial genome and plasmid are inserted into the genome of the cell containing the desired gene (often the cell of a plant or animal).