Quiz on Membrane Structure, Synthesis, and Transport

What is the basic framework of biological membranes?

• Carbohydrate layer

• Cholesterol layer

• Phospholipid bilayer

• Protein layer

What type of proteins are embedded in the hydrophobic region of the phospholipid bilayer?

• Transport proteins

• Glycoproteins

• Integral membrane proteins

• Peripheral membrane proteins

Which model describes the membrane as a mosaic of lipid, protein, and carbohydrate molecules?

• Static model

• Rigid model

• Fluid-mosaic model

• Dynamic model

What is the term for the process of covalently attaching a carbohydrate to a protein?

• Methylation

• Glycosylation

• Phosphorylation

• Hydroxylation

What is the primary function of transport proteins in biological membranes?

• To provide structural support

• To enable selective permeability

• To synthesize lipids

• To store energy

What type of transport does not require energy?

• Exocytosis

• Active transport

• Facilitated diffusion

• Endocytosis

What happens to a cell placed in a hypertonic solution?

• It remains the same

• It becomes turgid

• It shrinks

• It swells and may burst

Which type of transport protein allows the passage of molecules through a channel?

• Enzymes

• Receptors

• Channels

• Transporters

What is the role of cholesterol in biological membranes?

• To act as a transport protein

• To form bilayers

• To stabilize membranes

• To increase fluidity

What is the process called when cells take in substances by vesicle formation?

• Diffusion

• Endocytosis

• Exocytosis

• Phagocytosis