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.
Answer: C
You might also like to view...
In order for a G protein to be active:
A. the alpha subunit must bind GTP. B. the beta and gamma subunits must separate from the alpha subunit. C. both the beta and gamma subunits must bind GTP. D. the alpha subunit must bind GTP and the beta and gamma subunits must separate from the alpha subunit.
Consider a cell in which all of the homologous chromosomes experience nondisjunction during meiosis I. What would be the result of this event?
A. two polyploid gametes B. one trisomic and three monosomic gametes C. four aneuploid gametes D. four monosomic gametes E. four aneuploid gametes: one trisomic and three monosomic
Explain how dicer and miRISC are involved in the production and function of miRNAs
What will be an ideal response?
Why is a pyramid of numbers for a forest sometimes narrow at the bottom?
a. Energy decreases as it passes through each trophic level. b. Energy increases as it passes through each trophic level. c. Individual producers are small and very numerous. d. Herbivorous insects vastly outnumber large producers. e. Large producers vastly outnumber insects.