Answer:
Peptidoglycan
Step-by-step explanation:
Peptidoglycan (murein) consists of sugars and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria. Peptidoglycan is a unique and essential structural component in the cell wall of most bacteria, and it is used stimulates innate immune responses. Peptidoglycan determines the cell form and provides rigidity to the cell wall.
Peptidoglycan is an excellent target for antibiotics because it protects the bacteria cell wall.