How was E. coli was used to aid in the cloning of the bioluminescence genes from Vibrio fischeri?
A) Gene fragments from V. fischeri were transformed into E. coli and bioluminescent E. coli were identified.
B) Gene fragments from V. fischeri were cloned into plasmids, transformed into E. coli, and then retransformed back into V. fischeri.
C) Gene fragments from E. coli were used to disrupt the bioluminescence genes of V. fischeri by homologous recombination.
D) Transposons from E. coli were used to mutagenize the bioluminescence genes of V. fischeri.
A) Gene fragments from V. fischeri were transformed into E. coli and bioluminescent E. coli were identified.
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Carrier-mediated transport is also called
A. facilitated diffusion. B. active transport. C. exocytosis. D. endocytosis. E. phagocytosis.
The natural habitat of Acinetobacter sp. can best be described as the:
a. mucous membranes of animals. b. gastrointestinal tract of humans and other animals. c. natural environment. d. genitourinary tract of animals.
Which statement concerning radioisotope 14C
is false? a. It can be substituted for 12C in glucose and the body will still be able to use the compound. b. It has a different number of protons than 12C. c. It has more neutrons than 12C. d. It behaves the same chemically as 12C. e. It has six carbons and eight neutrons
If you carve your initials in the trunk of a tree, will they move up as the tree grows?
A) Yes. A tree elongates from the ground up. B) Yes. Secondary growth will cause them to move up. C) No. Elongation occurs just below the tips of growing stems in the apical meristems. D) No. Secondary growth continues in all parts of a plant throughout its life.