In producing a recombinant plasmid to be used to clone a given donor insert, it is possible to cut both the donor and plasmid with the same restriction enzyme, resulting in complementary sticky ends
Assuming plenty of plasmid DNA is available, why is further selection necessary before the introduction of the plasmid into a cellular system? A) Contamination will have introduced other donor inserts.
B) Some donor inserts will be single stranded and deteriorate.
C) Some donor inserts will be sensitive to particular antibiotics.
D) Some donor pieces will remain uninserted.
E) Some donor strands will be inserted with an incorrect orientation.
E
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Bacteriophages may reproduce using a(n) __________ pathway in which viral DNA becomes part of the host
chromosome. Fill in the blank(s) with the appropriate word(s).
Edward Jenner's work involved
A. inoculation of dried pus from smallpox pustules into a person to stimulate immunity. B. immunization using a related, less pathogenic organism to give protection against a more pathogenic one. C. development of an immunization to protect people against cowpox. D. development of passive immunotherapy.
Serial repetition of segments is a defining characteristic of which worm phylum?
A) Flatworms B) Annelids C) Roundworms D) Segmentation is not a defining characteristic of any of the worm phyla.
Suppose a small population of deer is introduced to an island. All of the original males have 6 to 10 points on their antlers, and the average male has 8 points
After several generations, if most males have antlers with 10 points and no males have 6 points, the population has undergone ________ selection. Fill in the blank(s) with correct word