In Early Forensic Applications of DNA Fingerprinting, DNA Was Extracted

question 32

Multiple Choice

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, polymerase chain reaction (PCR) is used in the early steps of forensic DNA analysis. Which of the following is an advantage that PCR provides 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.

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