Question

The stain used to visualise mitochondria is

• A. Fast green
• B. Safranin
• C. Janus green
• D. Acetocarmine

Answer 1

The correct option is C Janus green

Fast green

Fast green is used to stain histones.

Safranin

Safranin is used as a counterstain in some staining protocols to colour the cell nuclei red as well as to stain the cell wall.

Acetocarmine

Acetocarmine is used to visualise chromosomes at different stages of mitosis.

Janus green

Janus green acts as an indicator changing colour to blue in the presence of oxygen and pink in the absence of oxygen. Thus Janus green stain is used to demonstrate that mitochondria are oxidation-reduction sites in the cell.

Final answer: d. Janus green