Why is ethidium bromide added to the hot liquid agarose electrophoresis gel?

What is the letter A pointing to? Pic1.jpg

In a gel electrophoresis experiment should the positive electrode be attached closest to or farthest from the wells?  Why?

What molecule is made by the process of translation? [BLANK-1]

Even though its structure and function has been modified in different species, the humerus bone of vertebrate forelimbs is an example of ____________ because it arose from the same bone in a common ancestor.

If the concentration of Adenine is found to be 35% in a DNA molecule, what are the concentrations of Cytosine, Thymine, and Guanine?

A student nurse is placing an nasgostric tube (NG) for a client with a possible bowel obstruction. The nurse preceptor knows the student understands the rationale for the NG tube if the students says:

A nurse is reviewing the chart of a client who is scheduled to have radiological studies of the kidneys performed with the use of IV contrast dye. Which of the following client medications should the nurse withhold prior to the tests? 

A patient with a burn injury receives pantoprazole. The nurse understands that this medication is given to:

The nurse would initiate seizure precautions for which patient?