Question

some molecules are too big to pass through the phospholipid bilayer of the cell membrane. these molecules need to pass through ____ are embedded in the cell membrane.
a proteins
b ribosome
c cell wall
d carbohydrates

Explanation:

The cell membrane has embedded proteins that act as channels or carriers for large - sized molecules to pass through as they cannot diffuse through the phospholipid bilayer directly. Ribosomes are for protein synthesis, the cell wall is for structural support and protection in plant cells, and carbohydrates on the cell membrane are mainly for cell - cell recognition.

Answer:

A. proteins