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If the doubling time of a strain of bacteria is 30 minutes, how many cells would there be after 5 hours if the original culture had 1 X 105 cells?
(A) 5 X 105
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 08. Bacteria

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Replies to This Thread: 1 | ----
 
Posted: 04/14/2013 20:45
Please explain how you derive at the solution (1x10^8)
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Posted: 04/16/2013 20:15
Hi Dani. Say we start with n at t=0;
t=1, we have 2n;
t=2, 4n;
t=3, 8n;
t=4, 16n, or 2^t * n;
...
t=10, 2^10 * n = 1024 * 10^5 = about 10^8.
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