Radioisotopes Are Frequently Used to Label Molecules in a Cell

question 48

Multiple Choice

Radioisotopes are frequently used to label molecules in a cell. The fate of atoms and molecules in a cell can then be followed. Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the radioisotope ³²P. After a 48- hour incubation, the majority of the ³²P would be found in the S. cerevisiae's

• A) water.
• B) carbohydrates.
• C) cell wall.
• D) proteins.
• E) plasma membrane.

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