Question

Radioactively labeled uracil is added to a culture of actively dividing mammalian cells. In which of the following cell structures will the uracil be incorporated? Chromosomes Ribosomes Lysosomes Nuclear membrane

Answer 1

The correct answer is option - ribosomes.

Explanation:

A ribosome is a macromolecular machine made up of the rRNA and associated proteins that are present in the cytoplasm of the living cells. The function of the ribosomes is to form the polypeptide chain with the help of rRNA and tRNA.

As it is made up of the rRNA it will incorporate radioactive uracil if added to the mammalian cells in order to identify in a culture. RNA molecules incorporate uracil instead of thymine.

Thus, the correct answer is option - ribosomes.