CBSE Class 11-science Answered
Why do gram negative bacteria have all four rings(L,P,S,M) while gram positive bacteria have only two(S ,M)?
Asked by pb_ckt | 15 Apr, 2019, 03:21: PM
Expert Answer
In Gram-negative bacteria there are two pairs of rings i.e. four rings are L-(lipopolysaccharide) ring, P-(peptidoglycan) ring, S-(super membrane) ring, and M-(membrane) ring.
Outer membrane in Gram negative bacteria is made up of Lipopolysacchride (LPS). It is this layer which contributes to the pathogenicity in Gram negative bacteria which is absent in Gram positive bacteria.
Gram-positive bacteria have a single pair of rings. The S-ring is attached to inside thick layer of peptidoglycan and M-ring is attached to cell membrane
Answered by Sheetal Kolte | 15 Apr, 2019, 05:24: PM
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