Question

TUILLS

Answer 1

Oxygen molecules are too small and glucose molecules are quite large than oxygen. So they can't passively disuse inside a cell.

Option C

Explanation:

Glucose molecules are large molecules with a molecular formula of C₆H₁₂O₆ These molecules need special protein channels or transporters called Glucose Transporters or GLUT to make them way through the cell membranes. While smaller molecules like oxygen, carbon dioxide, smaller polar molecules like water or even fat soluble molecules like chloroform and benzene do pass through the membranes easily by means of passive diffusion.

The oxygen molecules are needed inside a human cell for aerobic respiration and glucose molecules are needed because of a respiratory substrate. So Glucose needs receptors and transporters to pass through the membranes.