Which of the following is demonstrated TRUE in this research? 1. L-forms are rod-shaped bacteria with their peptidoglycan layer removed. 2. E. coli with an intact outer membrane were unable to tolerate repeated stress events.
3. E. coli that had the outer wall removed immediately underwent osmotic lysis.
4. Drugs targeting the outer membrane could be used against both Gram-positive and Gram-negative cells
5. E. coli with a weakened outer membrane were unable to tolerate repeated stress events