Question

The different proteins found within eukaryotic cell membranes affect the function of the membranes. Which of the followin functions is most likelv provided by channel and carrier proteins that are embedded within the cell membranes?

© They allow the cell membrane to produce energy.
® They allow specific substances to enter the cell.
© They provide protection for the cell membrane.
© They aid in the digestion of foreign invaders.

Answer 1

They allow specific substances to enter the cell

Step-by-step explanation:

The function most likely provided by channel and carrier proteins that are embedded within the cell membranes is to allow specific substances to enter the cell.

Channel proteins form pores or channels in the membrane that allow small molecules or ions to pass through. These channels are usually selective and only allow specific molecules or ions to pass through, based on size and charge.

Carrier proteins, on the other hand, bind to specific molecules and undergo conformational changes to transport them across the membrane. This process is also selective and requires energy in the form of ATP.

Therefore, both channel and carrier proteins play a crucial role in regulating the movement of substances across the cell membrane and maintaining the internal environment of the cell.

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Answer 2

They allow specific substances to enter the cell.

Channel and carrier proteins that are embedded within the cell membranes serve as transporters that help in the movement of specific molecules or ions across the membrane. Channel proteins provide a pathway for the movement of ions or water molecules across the membrane, while carrier proteins bind to specific molecules and facilitate their movement across the membrane. This process is known as facilitated diffusion, which allows the selective entry of molecules into the cell. Hence, the primary function of channel and carrier proteins is to allow specific substances to enter the cell. The other options provided do not accurately reflect the functions of these proteins.