Cell Membrane Structure and Function Quiz

What is the primary function of the cell membrane?

• To store genetic information

• To act as a physical boundary and control substance passage

• To synthesize proteins

• To produce energy for the cell

What are the main components of phospholipids?

• Sugars and proteins

• Cholesterol and carbohydrates

• Amino acids and nucleotides

• Glycerol, two fatty acids, and a phosphate group

How do phospholipids arrange themselves in water?

• In a solid structure

• In a bilayer with tails facing each other

• In a single layer with heads facing inward

• In a random arrangement

What is the role of integral proteins in the cell membrane?

• To form channels for molecule passage

• To synthesize lipids

• To store energy

• To provide structural support

What does the fluid mosaic model describe?

• The process of protein synthesis

• The dynamic and flexible nature of the cell membrane

• The rigid structure of the cell wall

• The genetic code of the cell

How does cholesterol affect membrane fluidity?

• Increases fluidity by creating more space

• Makes the membrane more permeable

• Decreases fluidity by filling spaces between phospholipids

• Has no effect on fluidity

What happens to membrane fluidity as temperature increases?

• It decreases

• It remains constant

• It increases

• It becomes unpredictable

What is the primary function of the CFTR protein?

• To transport oxygen

• To synthesize proteins

• To store calcium

• To regulate the stickiness of mucus

What condition is associated with mutations in the CFTR gene?

• Diabetes

• Cystic fibrosis

• Hypertension

• Asthma

How does the CFTR protein affect chloride ions?

• It allows them to pass out of the cell

• It converts them into sodium ions

• It prevents their movement

• It stores them inside the cell