Use the Following Information to Answer the Questions Below

Multiple Choice

Use the following information to answer the questions below.
Nucleotides can be radiolabelled before they are incorporated into newly forming DNA and can therefore be assayed to track their incorporation. In a set of experiments, a student-faculty research team used labelled T nucleotides and introduced these into the culture of dividing human cells at specific times.
-Once they had determined which cells were dividing, the team wanted to use a ?non-radioactive method to track whether various physiological factors (such as food or body temperature) affected the action of the pathogen. Which of the following would be effective, simple, and safe?

A) measuring picograms of DNA
B) measuring numbers of chromosomes
C) measuring numbers of chromatids
D) counting the frequency of cells in mitosis
E) counting newly formed plasma membranes