Abiologist wants to test the rate of absorption into several different types of
cells, including red blood cells, muscle cells, and epithelial cells. she will use
radioactive labels to tag various molecules, which she can monitor and
record as they are taken up by each cell type. which molecule should the
biologist tag with the radioactive label in order to collect the data she is
looking for?
a. carbon dioxide
b. water
c. atp
d. glucose