Question

question 9
which of the following types of molecules are the major structural components of the cell membrane?
phospholipids and cellulose
proteins and cellulose
nucleic acids and proteins
phospholipids and proteins

Explanation:

Cell membranes are composed of a phospholipid bilayer, which forms the basic structure. Proteins are embedded in or associated with this bilayer. Phospholipids provide the structural framework (the bilayer), and proteins have various functions like transport, signaling, etc. Cellulose is a component of plant cell walls, not cell membranes. Nucleic acids (DNA and RNA) are mainly involved in genetic information storage and expression, not cell - membrane structure.

Answer:

phospholipids and proteins