Question

1. true or false: the cell membrane primarily functions to synthesize proteins.
2. true or false: selective permeability of the cell membrane allows all molecules to pass through unrestricted.
3. true or false: active transport mechanisms rely on the concentration gradient to move molecules.
4. true or false: simple diffusion involves the movement of large, polar molecules through the lipid bilayer.
5. true or false: the sodium - potassium pump is an example of active transport found in plant cells.
6. true or false: facilitated diffusion relies on integral membrane proteins to assist in molecule transport.
7. true or false: passive transport processes do not require energy input from the cell.
8. true or false: the fluid mosaic model describes the cell membrane as a rigid and unchanging structure.
9. true or false: active transport is essential for maintaining cellular homeostasis.
10. true or false: peripheral proteins are embedded within the lipid bilayer of the cell membrane.

Explanation:

1. The cell - membrane's main function is to regulate the movement of substances in and out of the cell, not to synthesize proteins. So, False.
2. Selective permeability means only certain molecules can pass through, not all. So, False.
3. Active transport moves molecules against the concentration gradient and does not rely solely on it. So, False.
4. Simple diffusion is the movement of small, non - polar molecules down the concentration gradient. Large, polar molecules do not move by simple diffusion through the lipid bilayer. So, False.
5. The sodium - potassium pump is an example of active transport in animal cells, not plant cells. So, False.
6. Facilitated diffusion uses integral membrane proteins to help molecules cross the membrane. So, True.
7. Passive transport, like diffusion and osmosis, does not require energy input from the cell. So, True.
8. The fluid mosaic model describes the cell membrane as a fluid and dynamic structure, not rigid. So, False.
9. Active transport helps maintain ion gradients and other cellular conditions, essential for homeostasis. So, True.
10. Peripheral proteins are attached to the surface of the lipid bilayer, not embedded within it. So, False.

Answer:

1. False
2. False
3. False
4. False
5. False
6. True
7. True
8. False
9. True
10. False