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?