Abiochemist conducted an experiment to follow the movement of glucose molecules in animal cells. glucose with radioactively labeled carbon atoms was added to a culture of liver cells growing in a petri dish. over the next 18 hours, the biochemist assessed selected biomolecules in the culture for radioactivity. explain how adding labled glucose molecules to the culture resulted in labeled glycine and describe what happened to the labled glucose molecules during the 18-hour period.