18. Molecular Genetic Tools

In a standard DNA extraction protocol, what is the primary purpose of adding cold alcohol (ethanol or isopropanol) to the aqueous lysate?

In gel electrophoresis, what is the primary purpose of a DNA ladder (molecular weight marker)?

In which direction does DNA move during agarose gel electrophoresis, and why?

In the DNA isolation process, detergent is used primarily to accomplish which of the following?

In a standard DNA extraction protocol, what is the primary purpose of adding a lysis solution?

Which career most directly combines DNA technology (e.g., DNA profiling) with forensic investigations to help identify individuals from biological evidence?

In agarose gel electrophoresis used for DNA analysis, which DNA fragments move faster through the gel toward the positive electrode?

In methods for analyzing DNA, gel electrophoresis separates (sorts) DNA molecules primarily on the basis of their:

In agarose gel electrophoresis, what is the primary purpose of a DNA ladder?

In a standard DNA extraction protocol, what is the primary purpose of adding isopropyl alcohol to the lysate?

In forensic DNA analysis, which part of a human hair is most likely to contain sufficient nuclear DNA for STR profiling?

In a standard DNA extraction protocol, why is detergent (e.g., SDS) added to the sample?

In the context of methods for analyzing DNA and gene expression, what is a reporter gene?

In agarose gel electrophoresis, how are DNA or RNA molecules typically visualized on the gel after separation?

In DNA fingerprinting, which sections of DNA are most commonly analyzed to distinguish between individuals?