Which of the following is the MOST likely way that scientists first identified streptomycetes?
A)through the observation that certain bacteria had a unique morphological structure (i.e., not a rod, sphere, etc.)in culture
B)through the observation that microorganisms did not grow in close proximity to certain bacteria in culture
C)through the collection of sequence data from the environment
D)through the observation of large bacteria (100 $\gt$M)in culture

Question

Which of the following is the MOST likely way that scientists first identified streptomycetes?
A)through the observation that certain bacteria had a unique morphological structure (i.e., not a rod, sphere, etc.)in culture
B)through the observation that microorganisms did not grow in close proximity to certain bacteria in culture
C)through the collection of sequence data from the environment
D)through the observation of large bacteria (>100 $\gt$M)in culture

Quizplus · Accepted Answer

Streptomycetes are known for their ability to produce antibiotics, and their identification was likely based on the observation that other microorganisms did not grow in close proximity to them in culture. This is because they produce substances that inhibit the growth of other microorganisms, which is why they are studied for their potential to produce new antibiotics. Observation of their unique morphological structure or large size would not have been specific enough to identify them as streptomycetes. Collection of sequence data from the environment may help to identify streptomycetes, but this technology was not available when they were first discovered.

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