Question

all cells must allow certain molecules, like water, nutrients, and minerals, to pass through the outer layer of the cell. which organelle acts as a semipermeable barrier between the cell and the environment? a cell wall b nuclear membrane c cell membrane d cytoplasm

Explanation:

• Cell wall: Found in plant cells, fungi, and some prokaryotes. It provides structural support and protection. It is not semi - permeable in the sense of regulating the passage of molecules in the same way as the cell membrane. It has large pores and is more of a rigid, protective layer.
• Nuclear membrane: Surrounds the nucleus. It controls the passage of substances between the nucleus and the cytoplasm, not between the cell and the external environment.
• Cell membrane: Composed of a phospholipid bilayer with embedded proteins. It is semi - permeable (selectively permeable). It allows certain molecules (such as water, small non - polar molecules, and some nutrients) to pass through while restricting the passage of others (like large polar molecules and ions without the help of transport proteins).
• Cytoplasm: The gel - like substance within the cell where organelles are suspended. It is not a barrier between the cell and the environment.

Answer:

C. Cell membrane