Which component is present only in the cell wall of Gram-positive bacteria but NOT in Gram-negative bacteria?

Explanation

Teichoic acids are unique components found only in the cell walls of Gram-positive bacteria. They are acidic, phosphate-containing polysaccharides that play a crucial role in maintaining the structural integrity of the cell wall and providing a negative charge to the cell surface.Gram-positive bacteria have a thick peptidoglycan layer (20-80 nanometers) and a teichoic acid layer, whereas Gram-negative bacteria have a thinner peptidoglycan layer (2-3 nanometers) and an outer membrane containing lipopolysaccharides.