Solve
Guides
0
Question
Animal cells uses thymine primarily for the synthesis of DNA. A group of sea urchin eggs was fertilized in sea water containing radioactive thymine. Following fertilization, samples of embryos were removed at regular intervals and the radioactivity in the nucleic acid was measured in counts per minute. The results obtained are shown in the given figure.
The radioactivity of the embryos increases with time probably results from
- Synthesis of new proteins by the developing embryos
- Synthesis of radioactive thymine by the developing embryos
- Oxidation of radioactive thymine
- Incorporation of radioactive thymine in new cell membranes
- Incorporation of radioactive thymine in new DNA during replication
Open in App
Solution
Verified by Toppr
Animal cells uses thymine primarily for the synthesis of DNA. A
group of sea urchin eggs was fertilized in sea water containing radioactive thymine. Following fertilization, samples of embryos were removed at regular intervals and the radioactivity in the nucleic acid was measured in counts per minute.The radioactivity of the embryos increases with time probably results from incorporation of radioactive thymine in new DNA during replicationThe graph shows an increase in the radioactive nucleotide, thymine, after fertilization. As the new sea urchin embryos grow, cell division occurs. The radioactive thymine is incorporated into new DNA in the growing embryos.
Therefore, the correct answer is option E.
group of sea urchin eggs was fertilized in sea water containing radioactive thymine. Following fertilization, samples of embryos were removed at regular intervals and the radioactivity in the nucleic acid was measured in counts per minute.
The radioactivity of the embryos increases with time probably results from incorporation of radioactive thymine in new DNA during replication
Was this answer helpful?
0
Similar Questions
Q1
Animal cells uses thymine primarily for the synthesis of DNA. A group of sea urchin eggs was fertilized in sea water containing radioactive thymine. Following fertilization, samples of embryos were removed at regular intervals and the radioactivity in the nucleic acid was measured in counts per minute. The results obtained are shown in the given figure.
The radioactivity of the embryos increases with time probably results from
The radioactivity of the embryos increases with time probably results from
View Solution
View Solution
Q3
Read the passage and answer the following question:
In order to prevent changes in volume due to osmosis, unfertilized frog oocyte was bathed in Frog Ringer's solution. The Frog Ringer's solution was supplemented with radiolabeled amino acids. A sample of oocytes was taken every 30 minutes and assayed for radioactivity. At time 1, the oocytes were fertilized. Samples were taken at five-minute intervals after fertilization and assayed for radioactivity. The results are presented in the graph.
The radioactivity measured after fertilization was taken up by
In order to prevent changes in volume due to osmosis, unfertilized frog oocyte was bathed in Frog Ringer's solution. The Frog Ringer's solution was supplemented with radiolabeled amino acids. A sample of oocytes was taken every 30 minutes and assayed for radioactivity. At time 1, the oocytes were fertilized. Samples were taken at five-minute intervals after fertilization and assayed for radioactivity. The results are presented in the graph.
The radioactivity measured after fertilization was taken up by
View Solution
View Solution
View Solution