Inside the Cell Membrane

What happens to a raw egg when it is soaked in vinegar for 24 to 48 hours?

• The egg becomes hard-boiled.

• The egg shell dissolves, leaving the membrane.

• The egg shrinks due to water loss.

• The egg expands due to water gain.

What is the main function of a cell membrane?

• It helps the cell move around.

• It stores genetic information.

• It controls what enters and leaves the cell.

• It produces energy for the cell.

Why is a cell's surface area important?

• It determines the cell's color.

• It controls how much food and waste can pass through the membrane.

• It helps the cell to divide.

• It protects the cell from damage.

Why are cells typically very small?

• Smaller cells are easier to move.

• Smaller cells have a larger surface area to volume ratio, which is efficient for transport.

• Larger cells would require too much energy to maintain.

• Smaller cells can hide from predators more easily.

What are the two main parts of a phospholipid and how do they interact with water?

• A polar head that loves water and nonpolar tails that fear water.

• A nonpolar head that loves water and polar tails that fear water.

• A polar head that fears water and nonpolar tails that love water.

• A nonpolar head that fears water and polar tails that love water.

How does cholesterol help the cell membrane in different temperatures?

• It makes the membrane rigid in all temperatures.

• It acts as spacers in cold temperatures and connects phospholipids in warm temperatures.

• It only helps in cold temperatures by making the membrane less fluid.

• It only helps in warm temperatures by making the membrane more fluid.

What is the main difference between integral proteins and peripheral proteins in a cell membrane?

• Integral proteins are only found on the outside, while peripheral proteins go through the membrane.

• Integral proteins go through the membrane, while peripheral proteins are found on the surface.

• Integral proteins are always enzymes, while peripheral proteins are always for transport.

• Integral proteins are loosely attached, while peripheral proteins are tightly embedded.

What is a key function of glycoproteins and glycolipids on the cell membrane?

• They help the cell produce energy.

• They store genetic information for the cell.

• They help the cell identify itself and communicate with other cells.

• They provide structural support to the cell's interior.