Which of the following describes movement of molecules into a cell through active transport? Hydrocarbons dissolve in the lipid bilayer and travel down a concentration gradient.

Molecules move through passages in the cell membrane that are created by channel proteins.

Pockets in the cell membrane form vesicles around extracellular material during endocytosis.

Vesicles carrying large molecules fuse with the cell membrane during exocytosis.

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous