A mixture of equal numbers of fast and slow dividing cells is cultures in a medium containing a trace amount of radioactively labeled thymidine for on
A mixture of equal numbers of fast and slow dividing cells is cultures in a medium containing a trace amount of radioactively labeled thymidine for one hour. The cells are then transferred to regular (unlabelled) medium. After 24 hrs of growth in regular media
A. fast dividing cells will have maximum radioactivity
B. slow dividing cells will have maximum radioactivity
C. both will have same amount of radioactivity
D. there will be no radioactivity in either type of cells
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Correct Answer - A
Radioactivity is mostly incorporated in rapidly dividing cell during S phase. Thus after 24 hour it will be mainly present in few rapidly dividing cell
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