A plasmid that has genes for resistance to two antibiotics, tetracycline and ampicillin, is cut with the restriction enzyme BamHI. BamHI cuts within the ampicillin resistance gene. Caenorhabditis elegans DNA that has been cut with BamHI is ligated into the linearized plasmid to make a genomic DNA library. The mixture is transformed into E. coli. Which antibiotic should be added to the medium to select cells that contain the recombinant plasmid?
A. ampicillin
B. neither ampicillin or tetracycline
C. tetracycline
D. ampicillin and tetracycline
E. x-gal
Answer: C
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LUCA, the last universal common ancestor, is:
A. a prehistoric protozoan cell. B. an embryonic cell (in fetus). C. the simplest bacterial cell. D. a cell from which all organisms descended.
The process by which cells acquire specialized forms and functions is called
A. cell growth. B. cell elasticity. C. cell differentiation. D. cell replication. E. None of the choices are correct.
The cell cycle is necessary in order for new cells to replace damaged or dead cells. In which part of the cycle are new cells formed?
A. Growth B. DNA Synthesis C. Preparation for Division D. Mitosis
Is there a one-to-one correspondence between the number of copies of nuclear and mitochondrial genomic DNA?
What will be an ideal response?