How would you best describe a protoplast in bacterial cells?

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A bacterial cell that has a cell wall but lacks a capsuleA bacterial cell possessing both a cell wall and a capsuleA bacterial cell without a cell wall and capsuleA bacterial cell that is especially vulnerable to penicillin

Explanation

A protoplast is defined as a bacterial cell that has lost both its cell wall and capsule, leaving only the plasma membrane intact. This distinguishes it from cells that retain their cell wall or capsule.