Question

multiple choice question the selectively permeable barrier that regulates the passage of materials into and out of the cell is the: nuclear envelope nucleus cytoplasm endoplasmic reticulum plasma membrane

Explanation:

To solve this, we analyze each option:

• Nuclear envelope: Regulates passage in/out of nucleus, not the cell. Eliminate.
• Nucleus: Cell's control center, not a barrier for the whole cell. Eliminate.
• Cytoplasm: Jelly - like substance inside cell, not a barrier. Eliminate.
• Endoplasmic reticulum: Involved in protein/lipid synthesis, not a cell - wide barrier. Eliminate.
• Plasma membrane: Known as the cell membrane, it is selectively permeable and regulates material passage into and out of the cell.

Answer:

E. plasma membrane