If cells are given a very short exposure to radioactive DNA nucleotide precursors followed by unlabeled DNA precursors for an hour or so before fixation,where is most of the radiolabel located?
A)in the cytoplasm
B)associated with the nuclear matrix
C)in the mitochondria
D)in the DNA loops surrounding the nuclear matrix
E)in the mesosome

Question

Quizplus · Accepted Answer

The radiolabeled DNA nucleotide precursors would be incorporated into the DNA loops surrounding the nuclear matrix before fixation, leading to the radiolabel being primarily located in this area.

If Cells Are Given a Very Short Exposure to Radioactive