Quick Answer. Bumps or lumps on the roof of the mouth can be noncancerous or cancerous. The most common bony outgrowths on the roof of the mouth are called palatal tori and occur in 20 to 30 percent of the population, according to Dr. William M. Bennett in a 2013 article in The New England Journal of Medicine. Continue Reading.
Biochemical tests are the tests used for the identification of bacteria species based on the differences in the biochemical activities of different bacteria.
Key biochemical methods used to distinguish Mycobacterial group. Niacin test: All species of mycobacterium produces Niacin (nicotinic acid) and the Mycobacterium tuberculosis accumulates the most. A positive niacin test provides preliminary evidence that an organism that exhibits a buff-colored, slow-growing rough colony may be M. tuberculosis. Nitrate Reduction test: Mycobacterium tuberculosis is a strongly nitrate positive organism. This test is valuable for the identification of M. tuberculosis, M. kansasii, M. szulgai and M. fortuitum.