The feature of "sticky ends" that makes them especially useful in DNA recombination is their ability to
A) bind to DNA and thereby activate transcription.
B) bind to ribosomes and thereby activate translation.
C) form hydrogen-bonded base pairs with complementary single-stranded stretches of DNA.
D) allow plasmids to attach to the main bacterial chromosome.
Answer: C
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Taxonomic separation into fungal phyla is based on
(a) sexual reproduction, or lack thereof. (b) whether the fungus is a parasite or saprophyte. (c) the production of certain metabolites, like citric acid. (d) the edibility of the fungus.
Which type of plant hormone is synthesized mainly in root tips and is apparently transported through
the plant in xylem sap?
a. gibberellins b. auxins c. oligosaccharins d. ethylene e. cytokinins
What are the three parts of a DNA nucleotide?
What will be an ideal response?
In E. coli, which enzyme catalyzes the elongation of a new DNA strand in the ? direction?
A) primase B) DNA ligase C) DNA polymerase III D) helicase