What is the primary function of the phospholipid bilayer in cell membranes?

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Question: What is the primary function of the phospholipid bilayer in cell membranes?

Options:

Correct Answer: Selective permeability

Solution:

The phospholipid bilayer provides selective permeability, allowing certain substances to pass while blocking others.

What is the primary function of the phospholipid bilayer in cell membranes?

What is the primary function of the phospholipid bilayer in cell membranes?

Step 1: Understand that the cell membrane is like a protective barrier around the cell.
Step 2: Know that the phospholipid bilayer is made of two layers of phospholipids, which are special molecules.
Step 3: Realize that the phospholipid bilayer has a hydrophilic (water-attracting) side and a hydrophobic (water-repelling) side.
Step 4: Learn that this structure allows the membrane to be flexible and form a barrier.
Step 5: Understand that selective permeability means the membrane can choose what goes in and out of the cell.
Step 6: Recognize that small or non-polar substances can pass through easily, while larger or polar substances are blocked.

No concepts available.