Question

Classification of bacteria based on salt concentration

Answer 1

D] Classification of bacteria on the basis of salt requirement1. Halophiles:Those bacteria that require high concentration of NaCl for growth.Cell membrane of halophilic bacteria is made up of glycoprotein with high content of negatively (-Ve) charged glutamic acid and aspartic acids. So high concentration of Na+ ion concentration is required to shield the –ve charge.Example: Archeobacteria, Halobacterium, Halococcus2. Halotolerant:Most of the bacteria do not require NaCl but can tolerate low concentration of NaCl in growth media are called halotolerant