Observe what substance the mitochondria are stained with.

Janus Green.

According to the Xia Qing Education Network, () A and Janus Green are infected with mitochondria; B, methyl green; C. Sudan red; D, pirome red. Answer: A, Janus Green.

In order to observe the distribution of DNA and RNA, it is necessary to use methyl green pirone red staining. DNA can be dyed green by methyl green, and RNA can be dyed red by Pyrone Red. Mitochondria can be dyed blue-green with Janus green for easy observation.

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