What is the evolutionary advantage of bacteria producing restriction endonucleases?
A. These enzymes are a defensive measure of bacteria to defend themselves against invading DNA of bacteriophages.
B. Bacteria use these enzymes to attack other bacteria and destroy their DNA.
C. They make these enzymes for humans to use in manipulating DNA.
D. Bacteria use these enzymes to repair their own mistakes made during DNA replication.
Answer: A
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An example of a selective medium for gram-positive organisms is:
a. MacConkey agar. b. blood agar. c. colistin and nalidixic acid. d. thioglycollate broth.
Four of the five answers are edible mycorrhizal fungi. Select the exception
a. chanterelles b. truffles c. shiitake mushrooms d. porcini mushrooms e. morels
Why is lysogeny advantageous to a bacteriophage?
A) it speeds up the viral infection cycle. B) the genetic material of the bacteriophage is amplified many times over that seen in a lytic phage. C) it allows the bacteriophage to infect cells it would not normally infect. D) it allows the bacteriophage to destroy the host cell's DNA. E) it enables the bacteriophage to take over the cell.
Common criteria to judge competing models to be used in passive prediction include:
A. model fit. B. data mining. C. degree of exogenous variation. D. pattern discovery.