Alexander Fleming Had Been Running Tests Using Staphylococcus, and He

question 79

Multiple Choice

Alexander Fleming had been running tests using Staphylococcus, and he left some plates out to incubate.Evidently, after returning to his lab after the weekend, he found that Penicillium mold was growing on his agar plates containing the growth of Staphylococcus.Looking more closely, he found a large, clear area around the mold colony where Staphylococcus colonies did not grow.Given this situation, a valid hypothesis would be that

• A)the Staphylococcus was being inhibited by the Penicillium mold.
• B)the Penicillium mold was being killed by the Staphylococcus.
• C)the bacteriological medium being used in the plates was somehow inhibitory to the Staphylococcus growth.
• D)the room temperature incubation was inhibitory to the growth of Staphylococcus.

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Definitions:

Tranquilizers

Substances often prescribed to soothe or calm the nervous system, assisting in alleviating symptoms of anxiety and stress.

L-DOPA

A chemical precursor of dopamine used as a medication to treat Parkinson's disease and dopamine-responsive dystonia due to its ability to cross the protective blood-brain barrier.

MPTP

A prodrug to the neurotoxin MPP+, which causes permanent symptoms of Parkinson's disease by destroying dopaminergic neurons in the brain.

Epinephrine

Also known as adrenaline, it is a hormone and neurotransmitter that plays a critical role in the body's fight-or-flight response.