Which one of the following bacterial translational proteins is not a GTP-binding protein?
A. IF-2
B. EF-Tu
C. EF-G
D. RF-1
D
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In a phenomenon known as satelliting, tiny colonies of Haemophilus spp. may be observed growing on sheep blood agar close to colonies of bacteria that can produce:
a. hemin. b. NAD. c. vitamin K. d. cystine.
A single-gene disease that can cause symptoms in a fetus is
A) Huntington disease. B) Alzheimer disease. C) malaria. D) osteogenesis imperfecta.
What result would you expect if a mutation eliminates one of the four arms of a tRNA?
A) The tRNA will fit into the A site but will not release the peptide at the P site. B) The tRNA will not be recognized by tRNA synthetase and cannot be charged. C) The tRNA will be charged with the wrong amino acid. D) The tRNA will not be able to undergo traditional complementary base pairing. E) There will be no effect on function, so long as the anticodon region is intact.
What is the loss of fertilizer and pesticides from soil by water moving through it?
A) the pesticide treadmill B) biomagnification C) soil erosion D) runoff