Hfr transfer involves all of the following except
A. a pilus connection between F+ and F- cells.
B. plasmid gene transfer.
C. F factor is part of the F+ donor chromosome.
D. high frequency transfer.
E. gene integration into the bacterial chromosome.
Answer: B
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Which of the following is most likely to be true about the mouse and rat myosin genes?
A. The nucleotide sequences are identical. B. The genes encode proteins with different functions. C. The genes are similar in sequence, but not identical. D. There is no homology between the two sequences. E. The genes encoding myosin closely resemble those encoding actins.
Restoring a marsh that has been damaged by human activities is an example of _____
a. biological magnification b. bioaccumulation c. ecological restoration d. globalization
When antibodies or other substances in serum cross-react with the test reagents, a false positive result can occur.
Answer the following statement true (T) or false (F)
In eukaryotes, pre-mRNA processing may involve all of the following except
A. addition of a 3' poly-A tail B. removal of exons from the pre-mRNA. C. addition of a 5' cap. D. pre-mRNA splicing by the spliceosome.