Question

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

Explanation:

Large molecules that cannot pass through the phospholipid bilayer of the cell - membrane use proteins embedded in the cell membrane for transport. Proteins can act as channels or carriers. Ribosomes are involved in protein synthesis and are not part of the membrane - transport mechanism for large molecules. The cell wall provides structural support and is not related to the transport of large molecules across the cell membrane. Carbohydrates on the cell membrane are mainly involved in cell - to - cell recognition and not in transporting large molecules across the membrane.

Answer:

A. proteins