Final answer:
The correct option E) E) Bactericidal against gram-positive bacteria. that is not a characteristic of quaternary ammonium compounds is bactericidal against gram-positive bacteria. They are stable, nontoxic, inexpensive, and have properties similar to phospholipids. Quats are effective against fungi, protozoans, enveloped viruses.
Step-by-step explanation:
The correct option that is not a characteristic of quaternary ammonium compounds is E) Bactericidal against gram-positive bacteria. Quaternary ammonium compounds, also known as quats, are a type of cationic detergent that disrupts the bacterial phospholipid bilayer and disrupts membrane integrity. They are stable, nontoxic, inexpensive, and have properties similar to phospholipids. Quats are effective against fungi, protozoans, enveloped viruses, but they are ineffective against endospores.
Bactericidal against gram-positive bacteria. Quaternary ammonium compounds, also known as quats, are a type of cationic detergent that disrupts the bacterial phospholipid bilayer and disrupts membrane integrity. They are stable, nontoxic, inexpensive, and have properties similar to phospholipids. Quats are effective against fungi, protozoans, enveloped viruses, but they are ineffective against endospores.