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1. |
Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive phosphorous. At the end of 48 hours, it is expected to find the radioactive label located in |
A. | RNA |
B. | enzymes |
C. | all of these |
D. | phospholipids |
Answer» D. phospholipids | |