Question

DNA fingerprinting has become a familiar forensic tool and has been cited in criminal trials. It is possible to do DNA fingerprinting with even a very minute sample of DNA because___________

• A. DNA contains only four different nitrogenous bases
• B. There are large quantities of DNA in each cell of the body
• C. DNA determines a very specific polypeptide chain
• D. One can used polymerase chain reaction

Answer 1

Answer: (B), (D)

The correct options are
B

There are large quantities of DNA in each cell of the body

D

One can used polymerase chain reaction

A technique called polymerase chain reaction is used to multiple copies of the DNA extracted from the sample. By this technique, a very small sample of DNA can be amplified to a large extent and then one can use other techniques to solve the criminal trials.