In order to know the pathway of the synthesized RNA, the given DNA sequence is prepared and then inserted in different cells. These cells are cultured in vitro in the presence of specific RNA precursor (radioactive uracil) and
are then studied by autoradiography. The results are shown in document 2:
Time iseconds)
120 240 320
Level of radioactivity In the nucleus
48 20 12
1
in the RNA
In the cytoplasm
12 20 31
synthesized (a. u.)
Document 2
5. Explain the usage of Uracil only ​