Multiple choice

During antibiotic as erythromycin production by Streptomyces erythreus the following data was collected. 1 hour (100 cells, 0 erythromycin); 5 hours (1500 cells, 15 units erythromycin); 10 hours (25,000 cells, 35 units erythromycin); 15 hours (65,000 cells, 45 units erythromycin); 20 hours (64,000 cells, 60 units erythromycin); 25 hours (50,000 cells, 50 units erythromycin).

Which is the most suitable time for harvesting erythromycin?

  1. 10 hours

  2. 15 hours

  3. 20 hours

  4. 25 hours
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

25 hours: even though, maximum yield of erythromycin is at 20th hour (60 units) but all product are harvested at the end of fermentation, i.e. 25 hours here.

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