If we add the hydrogen peroxide with a graduated cylinder that had vinegar in it the sample could get contaminated with an acid or base oil or all of the above

The correct answer is acid.

Explanation:

The sample would get adulterated with acid. This is due to the fact that vinegar is an acid. Application of a graduated cylinder, which possesses vinegar in it will infect the sample with an acid and the chemical reaction that the hydrogen peroxide is considered to be used for will be influenced negatively as a consequence of this adulteration.

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.