You are a brilliant graduate student and you are skeptical of the results found by the Lederbergs. You decide to repeat their experiment, but you do not have ready access to T1 bacteriophage. What might you use instead?

A. Salmonella bacteria
B. HIV (human immuno deficiency virus)
C. Ampicillin, an antibiotic that inhibits growth of bacterial cell wall
D. HPV (human papilloma virus)
E. EMS, a chemical mutagen


Answer: C

Biology & Microbiology

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Drought affects human society by causing

a. widespread crop failure. b. dried up wells. c. livestock death. d. human starvation. e. all of these.

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Foods rich in complex carbohydrates are usually high in

a. cholesterol. b. fiber. c. fats. d. oils. e. resins.

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When an action potential reaches the axon terminal, the ____ channels are activated to trigger synaptic vesicle release

a. voltage-gated Cl- channels b. voltage-gated Ca2+ channels c. voltage-gated Na+ channels d. ligand-gated Cl- channels e. ligand-gated Ca2+ channels

Biology & Microbiology

Which of the following is false about toxoplasmosis?

A) It is caused by a protozoan called Toxoplasma gondii. B) Meningitis results in a majority of patients since there are currently no treatment options. C) Tachyzoites can invade tissues like the heart, muscles, eyes, and brain. D) Risk factors include eating raw or undercooked meat such as wild game, pork, and shellfish. E) Cats act as the definitive host, shedding the protozoans in their feces.

Biology & Microbiology