L. A student was told that a drawing of a bacterial cell had been magnified 30 000 times. The length of the drawing was 45 mm. What was the actual length of the bacterium?

1.5 microns

Explanation:

It is given that the drawing of the bacterial cell is magnified by 30,000 times.

The size of the drawing of the bacterial cell is 45 mm

                                                                           =

Now size of the drawing = actual length of the drawing x magnification  

Actual length of the bacterium is given by

    =

or 1.5 microns

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

thats not even an aswer choice