Correct option is D
· Peptidoglycan, also known as murein, is a structural component of the bacterial cell wall, providing rigidity and strength.
· This polymer of sugars and amino acids prevents bacterial cells from bursting under hypotonic conditions, making them highly resistant to osmotic shock.
· Eukaryotic cells lack peptidoglycan; instead, they have cellulose (in plants) or chitin (in fungi), which do not provide the same level of osmotic protection.
· Peptidoglycan also plays a role in determining bacterial shape and protecting against mechanical stress.