Question

If yeast is allowed to grow for 270 mins. Then calculate number of E.coli. That would be formed​

Answer 1

Answer:

it would be 8

Explanation:

yeast devides every 90 minutes and it double s after that and 270/90 is 3 so it will devide 3 times that would make 2^3 would be 8

hope it helps

Answer 2

If yeast is allowed to grow for 270 mins. Then calculate number of E.coli,that would be formed :

• A-culture-has-100-E-coli-cells-and-is-allowed-to as for each 20 minutes each cell doubles so for first 20 minutes all the 100 E.coli cells doubles to give 200 E.coli cells.
• In 2 hours of time ,there exists 120 minutes which implies division occurs for 6 times.
• so,each time the existing bacteria doubles.
• 1st 20 minutes=> 100 E.coli= 200 E.coli.
• 2nd 20 minutes=>200 E.coli=400 E.coli
• The generation time for E. coli in the laboratory is 15-20 minutes, but in the intestinal tract, the coliform's generation time is estimated to be 12-24 hours.
• For most known bacteria that can be cultured, generation times range from about 15 minutes to 1 hour.  
• Symbionts such as Rhizobium tend to have longer generation times.