Question

question 38
2 points
when minute samples of dna need to be genetically analyzed for identification purposes, which test can be effectively used?
a weil-felix reaction
b western blot
c widal
d direct fluorescence antibody
e pcr

Explanation:

• Option A: Weil - Felix reaction is for detecting antibodies against rickettsial infections, not DNA analysis.
• Option B: Western Blot is used for detecting proteins, not DNA.
• Option C: Widal test is for diagnosing typhoid and paratyphoid, related to bacterial antigens and antibodies, not DNA analysis.
• Option D: Direct fluorescence antibody is for detecting antigens (usually proteins) in cells/tissues, not DNA.
• Option E: PCR (Polymerase Chain Reaction) is a technique that amplifies minute amounts of DNA, making it suitable for genetic analysis of small DNA samples.

Answer:

E. PCR