<prompt> Role of Malachite green in LJ medium ?Increase growth of M. tuberculosisInhibits growth of other bacteriaNutritive valueAs an indicator  <response>: Ans. is b i.e., Inhibits growth of other bacteria Lowenstein-Jensen Medium LJ medium LJ medium consists of mineral salts, asparagine, glycerol, malachite green and hens egg. The malachite green prevents the growth of other microorganism on medium. It is used as a primary isolation medium for mycobacteria. 