Biology

The correct answer is: A.is found in all cells.

Explanation:

The cell membrane is a flexible, semi-permeable barrier that surrounds all types of cells (both plant and animal cells), regulating the movement of substances in and out of the cell. It is present in all cells, unlike the cell wall, which is only found in plant cells, fungi, and some bacteria.

Why the other options are incorrect:

B.Is made of chromatin: Chromatin is made of DNA and proteins and is found inside the nucleus, not part of the cell...