Question

match the properties described with one of the four components of a membrane.
can span both layers of a membrane
can allow diffusion of gases
helps determine the overall shape of a cell
can form channels to allow small molecules to cross membranes
forms a semipermeable barrier
often carbohydrate attached to lipid or protein
reset
interior protein network phospholipid bilayer
transmembrane protein cell surface marker

Explanation:

1. Interior protein network: Helps determine the overall shape of a cell (cytoskeleton - related interior proteins maintain cell shape).
2. Phospholipid bilayer: Can allow diffusion of gases (small non - polar gases like O₂, CO₂ diffuse through lipid bilayer); Forms a semipermeable barrier (phospholipid bilayer is the basic semipermeable structure of the membrane).
3. Transmembrane protein: Can span both layers of a membrane (definition of transmembrane proteins - they traverse the lipid bilayer); Can form channels to allow small molecules to cross membranes (transmembrane proteins can be channel proteins for molecule transport).
4. Cell surface marker: Often carbohydrate attached to lipid or protein (glycolipids, glycoproteins which act as cell surface markers have carbohydrates attached to lipids or proteins).

Answer:

• "Can span both layers of a membrane" → Transmembrane protein
• "Can allow diffusion of gases" → Phospholipid bilayer
• "Helps determine the overall shape of a cell" → Interior protein network
• "Can form channels to allow small molecules to cross membranes" → Transmembrane protein
• "Forms a semipermeable barrier" → Phospholipid bilayer
• "Often carbohydrate attached to lipid or protein" → Cell surface marker