You examine a cell by electron microscopy and find a molecule on the outside of the cell and in vesicles in the cytoplasm.The most likely explanation is that this substance moved into the cell by
A)diffusion.
B)osmosis.
C)facilitated diffusion.
D)endocytosis.
E)apoptosis.

Question

Quizplus · Accepted Answer

The fact that the molecule is found in vesicles in the cytoplasm suggests that it was taken up by the cell through endocytosis, which involves the engulfment of extracellular molecules or particles. This process is a common way for cells to take up large molecules or particles that cannot diffuse or be transported across the plasma membrane through other means.

You Examine a Cell by Electron Microscopy and Find a Molecule