The bacteria Streptomyces is a microorganism found in soil - Scottish Highers Biology - Question 3 - 2018
Question 3
The bacteria Streptomyces is a microorganism found in soil. It produces a secondary metabolite, the antibiotic streptomycin, which kills other microorganisms. Strept... show full transcript
Worked Solution & Example Answer:The bacteria Streptomyces is a microorganism found in soil - Scottish Highers Biology - Question 3 - 2018
Step 1
Name the growth phase during which streptomycin is produced.
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Answer
The growth phase during which streptomycin is produced is the stationary phase.
Step 2
Explain the advantage to Streptomyces of producing an antibiotic such as streptomycin.
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Answer
Producing an antibiotic like streptomycin allows Streptomyces to reduce or eliminate competition from other microorganisms, ensuring it can secure more nutrients and space for growth.
Step 3
Suggest the benefit to Streptomyces.
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The benefit to Streptomyces is that it can utilize the carbohydrates provided by the plant roots for its energy and growth.
Step 4
Suggest the benefit to the plant.
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The benefit to the plant is that it receives protection from pathogens and harmful microorganisms, as Streptomyces can kill these threats.
Step 5
Name one antibiotic with which streptomycin could be validly compared.
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Fusidic acid or Gentamycin could be validly compared to streptomycin.
Step 6
Give a conclusion which can be drawn from the results.
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Streptomycin is less effective than some other antibiotics like erythromycin but might still be beneficial in a specific context. The survival rates indicate that it is not the most effective antibiotic at the same concentration.
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