Question

the diagram shows some of the many types of lipids, carbohydrates, and proteins that make up the cell membrane. these molecules have different roles and work together to carry out the cell membranes functions. phospholipids give the membrane its flexible structure and serve as a semipermeable barrier. cholesterol is a lipid that helps the bilayer maintain an ideal level of flexibility. carbohydrate groups serve as cell - identification markers and help with cell - to - cell communication. integral proteins serve a variety of functions, such as channeling or pumping large molecules across the membrane. peripheral proteins can detach from the cell membrane and serve a variety of functions, such as facilitating chemical reactions. decide whether each function is carried out by lipids, proteins, or carbohydrates in the cell membrane. allow the cell to be recognized by other cells. give the membrane its flexibility. pump large molecules across the membrane.

Explanation:

1. Carbohydrate groups serve as cell - identification markers, allowing the cell to be recognized by other cells.
2. Phospholipids and cholesterol (both lipids) give the membrane its flexibility. Phospholipids provide the basic flexible structure and cholesterol helps maintain an ideal level of flexibility.
3. Integral proteins help move large molecules across the membrane.

Answer:

1. Carbohydrates
2. Lipids
3. Proteins