Question

A forensic scientist finds a single skin cell from saliva on a cigarette butt left in a room where a murder has just occurred. What process might he or she utilized to accumulate enough DNA to determine who left the cigarette at the scene of the crime?
A. Genetic engineering

B. Gene therapy

C. Gel electrophoresis

D. Polymerase chain reaction

Answer 1

The best answer for this question would be: 

 

D. Polymerase chain reaction

 

It is used in molecular biology in order to create small fragments of the DNA. Those copies of the DNA mimic the happenings in the cell. This chain reaction is an efficient technique to further research on crimes.