Question

This substance is present in the cell walls of gram positive bacteria only------ *
lipopolysaccharides
teichoic acid
none of these
peptidoglycan​

Answer 1

Answer:

its peptidoglycans ...........................................................

Explanation:

Answer 2

Answer:

peptidoglycan.

Both gram positive and gram negative cell walls contain an ingredient known as peptidoglycan (also known as murein). This particular substance hasn't been found anywhere else on Earth, other than the cell walls of bacteria.