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otez555 [7]
2 years ago
12

A scientist carried out an experiment to follow the movement of carbon atoms within animal cells. To do this, the scientist adde

d glucose with radioactively labeled carbon atoms to a culture of cells growing in a Petri dish.
After a certain amount of time had passed, the scientist tested parts of cells for radioactivity. Radioactivity was detected in various biomolecules, including DNA.


Which of the following statements best explains why radioactivity was detected in the DNA?
Choose 1 answer:

(Choice A)
The DNA was in close proximity to the radioactive glucose during its formation.

(Choice B)
Carbon atoms that were once in the radioactively labeled glucose were used to form DNA.

(Choice C)
The DNA was made up of radioactively labeled glucose subunits.
Biology
1 answer:
ollegr [7]2 years ago
8 0

Answer:

B? Hope this helps, sorry if it's wrong.

Explanation:

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Plants and animals assimilate carbon-14 from carbon dioxide throughout their life. When they die, they stop exchanging carbon with the biosphere and their carbon-14 content begins to decrease at a rate determined by the law of radioactive decay.

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Carbon-14 is a weakly radioactive carbon isotope; It is also known as radiocarbon, and is an isotopic stopwatch.

Radiocarbon dating is only applicable to organic materials and some inorganic materials (not applicable to metals).

Proportional gas counting, liquid scintillation counting, and accelerator mass spectrometry are the three main methods of radiocarbon dating.

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