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Cell The Unit of Life — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYCell The Unit of Life1 Mark
MCQ
The stain used to visualise mitochondria is:
  • A
    Fast green.
  • B
    Safranin.
  • C
    Acetocarmin.
  • D
    Janus green.
✓

Answer

  1. Janus green.

Explanation:

Janus green is used to stain mitochondria. Janus green act as an indicator and changes colour according to the amount of oxygen present. It oxidizes to blue colour in. presence of oxygen and in its absence changes its colour to pink. Safranin is used to stain nuclei and lignified walls of cell. Acetocarmine is used for staining nucleic acid and chromosomes. Fast green It is used for staining his tones at alkaline pH after acid extraction from DNA.

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