Which of the following describes movement of molecules into a cell through active transport? A. Hydrocarbons dissolve in the lipid bilayer and travel down a concentration gradient.
B. Molecules move through passages in the cell membrane that are created by channel proteins.
C. Pockets in the cell membrane form vesicles around extracellular material during endocytosis.
D. Vesicles carrying large molecules moving downhill fuse with the cell membrane.

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

What are the three types of counseling established by marine corps policy?

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.