In early forensic applications of DNA fingerprinting,DNA was extracted from crime scene material,digested with restriction enzymes,and then used to prepare a Southern blot.Today,PCR is used in the early steps of forensic DNA analysis.What advantage does PCR provide over the former method?
A)PCR produces many more bands for fingerprint analysis,making it a more informative technique.
B)PCR can cut DNA at many more sites than can restriction enzymes.
C)PCR requires much less DNA for analysis.
D)PCR can analyze DNA,proteins,and carbohydrates,whereas restriction enzyme analysis is limited to DNA.

Question

Quizplus · Accepted Answer

PCR requires much less DNA for analysis compared to the former method of using restriction enzymes and Southern blotting. This is particularly useful in forensic analysis, where the amount of available DNA may be limited or degraded. PCR can amplify even small amounts of DNA, whereas Southern blotting required a larger quantity of DNA.

In Early Forensic Applications of DNA Fingerprinting,DNA Was Extracted from Crime