Meselson and Stahl relied on equilibrium density gradient centrifugation in a ________ solution to resolve the DNA containing 14N from the DNA containing 15N.
A) radiolabeled phosphate
B) calcium chloride
C) radiolabeled nitrogen
D) sodium acetate
E) cesium chloride
E) cesium chloride
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The use of venom for paralyzing prey is common in
a. cowries. b. Triton's trumpet snail. c. cone snails. d. mantis shrimp. e. sea stars.
You might have been accidentally exposed to an insecticide while working in a citrus grove. What symptoms of poisoning would you watch for?
A) depression B) Alzheimer's disease C) muscle tremors D) excessive urination
A chemical that inhibits beta-lactamase enzymes is
A. imipenem. B. aztreonam. C. clavulanic acid. D. synercid. E. penicillinase.
Humans are the only reservoir for (Balantidium/Entamoeba/Giardia), an intestinal parasite that causes diarrhea.
Fill in the blank(s) with the appropriate word(s).