An animal cell that is surrounded by fresh water will burst because osmosis causes a. water to move into the cell. b. water to move out of the cell. c. solutes to move into the cell. d. solutes to move out of the cell.

Which one of the following is true of trnas? a) trnas are double-stranded. b) each trna binds a particular amino acid. c) there are four types of trna. d) trnas carry special sequences known as codons. e) all of the above