Question

penicillin halts bacterial infections
by stimulating a persons immune system.
by damaging the cell membrane.
by interfering with the construction of the cell wall.
by causing the dna of a bacterium to mutate.
all answers are correct.

Explanation:

Penicillin is an antibiotic that targets bacterial cell wall synthesis. It inhibits the enzymes responsible for cross-linking peptidoglycan, a key component of bacterial cell walls. This weakens the cell wall, leading to bacterial lysis and stopping the infection. It does not stimulate the immune system, damage cell membranes directly, or cause bacterial DNA mutation.

Answer:

by interfering with the construction of the cell wall.