The stain used to visualize mitochondria is
a) Fast green
b) Safranin
c) Aceto carmine
d) Janus green
Ans. The answer is the option (d) Janus green
Explanation: Janus green is a basic vital stain that is used to demonstrate mitochondria as the oxidation-reduction site in the cell. When the stain reacts with oxygen, it changes its colour to blue.