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As we mentioned in an earlier blog post, a cell is essentially a drop of a thick, watery substance (cytoplasm) surrounded by a layer of fats (cell membrane). The cell membrane separates the inside of the cell from the outside…
For centuries, scientists have used model organisms from the three domains of life, bacteria, archaea, and eukaryotes, to understand biological functions. For example, the bacterium Escherichia coli (E. coli), which has been studied for more than 60 years, has provided important…
Read More Why is C. elegans so popular in the biology laboratory?
Since the 1980’s, DNA evidence has been used in the criminal justice system to help convict violent offenders and, just as importantly, exonerate innocent individuals. An approach often used is DNA profiling, a technique where investigators compare the base pair…
Agarose gel electrophoresis is a biotechnology technique used to separate DNA molecules according to their size. The mixture of molecules is added into depressions (or “wells”) within a gel, and then an electrical current is passed through the gel (Fig.…
