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Nucleotides can be radiolabeled 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 labeled T nucleotides and introduced these into the culture of dividing human cells at specific times.
The research team used the setup to study the incorporation of labeled nucleotides into a culture of lymphocytes and found that the lymphocytes incorporated the labeled nucleotide at a significantly higher level after a pathogen was introduced into the culture. They concluded that
infection causes lymphocytes to divide more rapidly.



Answer :

The S phase, which occurs between the G1 and G2 stages of the cell cycle, is the phase during which DNA replication takes place.

What is the S phase for?

The S phase, also known as the synthesis phase, is the stage of cell division before the cell enters the meiotic mitotic stage. During this phase, the DNA of the cells is copied, doubling the size of the genome.

The production of nucleotides is a component of the synthesis that happens during the s-phase.

After the DNA has been created, the radiolabeled nucleotides can be integrated, allowing the length of the S-phase of the cell cycle to be calculated.

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