During translation, if the ribosome arrives at one of three codons—UAA, UAG, UGA—what will happen next?
A) A tRNA molecule will recognize this "start sequence" on mRNA and bind to it.
B) A tRNA molecule will add a threonine to the growing amino acid chain and then float away.
C) An mRNA molecule will add a threonine to the growing amino acid chain and then float away.
D) Translation will end, and the amino acid chain and mRNA will be released from the ribosome.
E) A translation error will occur because tRNA is incapable of reading those three "nonsense" codons.
D) Translation will end, and the amino acid chain and mRNA will be released from the ribosome.
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A panda bear who consumes a diet primarily of eucalyptus leaves would be considered a
a. generalist and a carnivore. b. generalist and a herbivore. c. specialist and a carnivore. d. specialist and a generalist. e. specialist and a herbivore.
The conversion of ammonium to nitrate could be accomplished by the presence of
A. Nitrosomonas alone. B. Nitrobacter alone. C. Anabaena alone. D. both Nitrosomonas and Nitrobacter.
In producing a genomic library, human DNA and plasmid DNA must first be treated with:a
the same restriction enzyme. b. different restriction enzymes. c. the same DNA ligase. d. different DNA ligases. e. cosmid cloning vectors
Variations within a population are maintained by
A. mutation B. genetic recombination due to fertilization C. gene flow D. all of the choices are correct