Quiz 1 – Ch4: Cell Membranes [EASE 2]

What is the main role of the cell surface membrane?

• To make energy (ATP).

• To store the cell's DNA.

• To control what goes into and out of the cell.

• To give the cell a permanent rigid shape.

What is the basic structure of a cell membrane called?

• Protein layer.

• Single phospholipid layer.

• Phospholipid bilayer.

• Carbohydrate mesh.

Which part of the phospholipid molecule is attracted to water?

• The hydrophobic tails.

• The rigid middle section.

• The hydrophilic head.

• The non-polar chain.

The word "hydrophobic" means:

• Water-loving.

• Water-hating.

• Water-neutral.

• Water-transporting.

What does the term "Fluid" in the Fluid Mosaic Model refer to?

• The water outside the cell.

• The movement of phospholipids and proteins.

• The rigid structure of proteins.

• The non-polar nature of the tails. 

Which molecules form the "mosaic" pattern in the membrane model?

• Water

• Cholesterol

• Proteins

• Simple sugars

What kind of membrane is described as being able to control which substances pass through it?

• Freely permeable.

• Completely permeable.

• Partially permeable.

• Non-permeable.

Which molecules in the cell membrane act as cell surface receptors for hormones?

• Phospholipids

• Cholesterol

• Glycoproteins

• ATP

Which component helps strengthen the animal cell membrane and control its fluidity?

• Carbohydrates

• Nucleus

• Cholesterol

• Cytoskeleton

Where are the hydrophobic tails of the phospholipid bilayer located?

• Facing the outside environment.

• Facing the cytoplasm.

• Clustered in the inner core.

• Floating freely outside the cell.