Inside the Cell Membrane

What is the primary reason for soaking a raw egg in vinegar in the experiment described?

• To cook the egg without heat.

• To make the egg shell stronger.

• To dissolve the eggshell, leaving the membrane intact.

• To change the color of the egg.

What does it mean for a cell membrane to be "semi-permeable"?

• It allows all substances to pass through freely.

• It prevents all substances from entering or leaving the cell.

• It selectively allows certain substances to pass through while blocking others.

• It changes its permeability based on the cell's size.

Why is a high surface area to volume ratio important for cells?

• It helps the cell move faster.

• It allows for efficient exchange of materials like food and waste.

• It makes the cell appear larger under a microscope.

• It protects the cell from external damage.

According to the Modern Cell Theory, which of the following organisms possess a cell membrane?

• Bacteria and Fungi

• Plants and Animals

• Protists and Archaea

• All living things

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

• A polar head that dislikes water and nonpolar tails that like water.

• A nonpolar head that likes water and polar tails that dislike water.

• A polar head that likes water and nonpolar tails that dislike water.

• A nonpolar head that dislikes water and polar tails that like water.

What is the main function of cholesterol in the cell membrane?

• To help transport large molecules across the membrane.

• To provide energy for the cell.

• To maintain the membrane's fluidity by preventing it from becoming too stiff or too fluid.

• To act as a receptor for cell signaling.

Which type of protein typically goes all the way through the cell membrane and is often involved in transporting materials?

• Peripheral proteins

• Integral proteins

• Glycoproteins

• Glycolipids

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

• Storing genetic information.

• Providing structural support to the cell.

• Helping cells recognize each other and communicate.

• Producing energy for the cell.