Question

Which character is applicable to Mycoplasma?
A)They pass through bacteria-proof filter paper.
B)They are osmotically inactive.
C)They require sterol for growth.
D)All of the above.

Answer 1

Mycoplasma is a class of bacteria lacking a cell wall around their cell membranes. This function makes them naturally resistant to antibiotics that target the synthesis of cell walls (like the beta-lactam antibiotics). They may be saprotrophic or parasitic.

Complete answer:
The smallest bacterium that does not have a cell wall which can slip through the bacteria-proof filter is Mycoplasma. Since only the cell membrane is there, they are osmotically inactive. They have a sterol cell membrane that does not aid much in maintaining the osmotic conditions in the cell. In order to create the structure of the cell membrane, sterols are needed. In the genus Mycoplasma, more than 100 species are included. Microbes of the genus Mollicutes, to which Mycoplasma belongs, are human, animal, and plant parasites or commensals.

The Mycoplasma species uses hosts of vertebrates and arthropods. In Mycoplasma and Phytoplasma, dietary nitrogen availability has been shown to change codon bias and gene evolution. These species can alter their form and are pleomorphic due to the absence of cell walls. Lack of a nucleus and other organelles connected to the membrane.

Hence, the correct answer is option (D)

Note: Mollicutes are also known as Mycoplasma bacteria. They are the simplest prokaryotes that are free-living and the smallest. In the pleural cavities of cattle suffering from pleuropneumonia, mycoplasma bacteria have been found. These species are also referred to as MLO or PPLO (mycoplasma-like organisms) (pleuropneumonia-like organisms).