The diagram below represents the distribution of some molecules inside and outside of an artificial cell over a period of time . Which statement is best supported by the diagram?

1. Oxygen molecules entered the cell over time by active transport.
2. Water molecules are too large to enter or leave the cell, so they remained where they were at the start of the investigation.
3. Protein molecule are kept inside of the cell because the cell needs them.
4. The protein molecules are too large to diffuse out the cell.

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.