In the trp operon, tryptophan acts as a:

Centromeres are characterized by:

Which RNA is least abundant in cells?

The 2′ hydroxyl of ribose in RNA contributes to:

Topoisomerases are required to:

The hydrogen bonds in a GC base pair total:

Histone acetylation generally results in

piRNAs function mainly in:

Attenuation in the trp operon depends on:

Which of the following would be considered a capital offense?