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The nanoparticles release silver ions that disrupt the bacteria's cell membrane, damage their DNA, and denature proteins. Credit: Chisato Takahashi (AIST). Disclaimer: AAAS and EurekAlert!

Cell wall Tough outer layer of the cell, which provides strength and support to the cell. Large circular DNA molecule Bacteria do not have a nucleus and their genetic material (DNA) is not ...

For example, bacteria have a rigid cell wall, whereas human cells are surrounded only by a simple membrane. If a pharmaceutical agent targets cell wall construction, only bacterial cells are affected.