Question

bacterial replication
· binary fission - produces two daughter cells that are identical to parents
· new genes acquired by
。random mutation
。transformation
。conjugation
value: 10
when bacterial cell replicates by binary fission the
a. daughter cells will get only half of the parents genome
b. daughter cells will get a copy of the entire parents genome
c. half of the genome from one parent and half from the other
parent
check answer
· if a bacterial cell replicated every 30 minutes, how many bacterial cells would be in a
culture started from a single bacterium in 1 hour? answer is 4. time zero 1, in 30
minutes 2, and in an hour 4.
value: 10
if a bacterial cell replicated every 30 minutes, how many bacterial cells
would be in a culture started from a single bacterium in 2 hours?
a. 4
b. 8
c. 10
d. 12
e. 16
f. 24

Explanation:

Step1: Determine the number of replication cycles

The replication time is 30 minutes. In 2 hours (120 minutes), the number of replication cycles \(n=\frac{120}{30} = 4\)

Step2: Use the formula for exponential growth

The formula for the number of bacteria after \(n\) replication cycles starting from \(N_0 = 1\) (single bacterium) is \(N = N_0\times2^n\)
Substitute \(N_0 = 1\) and \(n = 4\) into the formula: \(N=1\times2^4\)
Calculate \(2^4=2\times2\times2\times2 = 16\)

Answer:

E. 16