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
often carbohydrate attached to lipid or protein
forms a semipermeable barrier
interior protein network phospholipid bilayer
transmembrane protein cell surface marker
reset

Explanation:

1. Interior protein network: Helps determine the overall shape of a cell (cytoskeleton - like role in cell structure).
2. Phospholipid bilayer: Can allow diffusion of gases (small, non - polar gases like O₂, CO₂ can diffuse through the lipid bilayer), Forms a semipermeable barrier (the basic structure that controls what enters/exits the cell).
3. Transmembrane protein: Can span both layers of a membrane (definition of transmembrane proteins), Can form channels to allow small molecules to cross membranes (ion channels, etc., are transmembrane proteins).
4. Cell surface marker: Often carbohydrate attached to lipid or protein (glycolipids, glycoproteins act as cell surface markers for identification).

Answer:

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