Form a hypothesis: a scientist uses radioactive nitrogen to label the nitrogenous bases of the dna of a cell. then the dna is allowed to replicate, and the new strands take up non-radioactive bases. do one, both, or neither of the daughter cells have radioactive dna? explain.

The new strands took only non-radioactive bases during their replication. This implies that the radioactive bases did not get incorporated in the new strands.     Also, according to semi-conservative mode of replication, one parental and one newly synthesized strand goes to the daughter cells. Since it is a hypothetical situation according to which parental strand has radioactive labeling, the radioactive strand will pass on to both the daughter cells.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.