Cells require glucose as a source of energy to carry out life processes. large molecules like glucose cross the cell’s plasma membrane by..

The correct answer is - Facilitated diffusion through protein channels.  

Explanation:

Glucose is a large molecule which is a 6- carbon sugar that stored energy for cellular functions. As it is a macromolecule that is difficult to move across the cell membrane by simple diffusion.

The facilitated diffusion is the process that helps large molecules to pass through the plasma membrane down the concentration gradient with the help of protein channels. As the glucose moves down the gradient by this process there is no need for energy as channels regulate the movement of molecules.

Thus, the correct answer is - Facilitated diffusion through protein channels.

the answer to your question is b