Microbiology Which of the following is a feature of gram-positive bacteria rather than gram-negative bacteria? A Lipid A-containing lipopolysaccharide B Lipoprotein in periplasmic space C Outer membrane D Thick peptidoglycan cell wall 💡 Explanation Which of the following is a feature of gram-positive bacteria rather than gram-negative bacteria? ✓ Correct Answer: D. Thick peptidoglycan cell wall