In gel electrophoresis why does the DNA move towards the bottom of the wall of gel?

A) DNA is negatively charged

B) DNA is positively charged

C) DNA is extremely heavy

D) DNA is less dense than air

Where are sulfhydryl groups found?

Carnivores are generally considered autotrophs or heterotrophs?

The scientific name for a cougar is Puma concolor. What other organisms might be closely related to the cougar?

Which of these is mostly made up of ice? A.) meteors B.) comets C.) asteroids

A reflex is the body's automatic response to certain stimuli. give two examples of reflex responses.

If you were shipwrecked on the northwest shore of the sea of okhotsk, which of these physical regions would you most likely be closest to?

Why does the nucleus have a positive charge?

Why would the solution not be considered to be in equilibrium? The solvent molecules are not all located on the right side of the container. The solute molecules are not evenly distributed throughout the solvent.

Is oil or biomass abundant

Which region of a tRNA molecule binds to amino acids? a. Anticodon loop b. Codon loop c. The 3' end d. Variable loop