If plant cells are grown on media containing radioactively labeled thymine for one generation, radioactively labeled macromolecules will be detected in which of the following organelles?
A) only in the nucleus
B) only in the nucleus and mitochondria
C) only in the nucleus and chloroplasts
D) in the nucleus, mitochondria, and chloroplasts

Question

Quizplus · Accepted Answer

Thymine is a nucleotide base found in DNA. Since DNA is present in the nucleus, mitochondria, and chloroplasts, radioactively labeled thymine would be incorporated into the DNA of all these organelles during replication.

If Plant Cells Are Grown on Media Containing Radioactively Labeled