If plant cells are grown on media containing radioactively labelled thymine for one generation, radioactively labelled macromolecules will be detected in which of the following?
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

Radioactively labelled thymine will be incorporated into DNA during replication, leading to the production of macromolecules containing the labelled nucleotide in both the nucleus and organelles that have their own DNA, such as mitochondria and chloroplasts. Therefore, radioactive macromolecules will be detected in the nucleus, mitochondria, and chloroplasts.

If Plant Cells Are Grown on Media Containing Radioactively Labelled