The difference between essential and non-essential amino acids is that:
essential amino acids contain protein, and non-essential ones don't.
essential amino acids break down into sugar, while non-essential amino acids break down into lipids.
non-essential amino acids are produced by the body, while the body cannot produce essential amino acids on its own.
All of these choices are correct.

An experiment was performed on a 2-kg block. forces of 5, 10 and 15 newtons respectively were applied to the block for 5 seconds. describe the difference in acceleration between the three trials. a) the final accelerations will all be the same. b) the final acceleration will triple between the first and third trial. c) the final acceleration will be cut by 1/3 from the first to third trial. d) the final acceleration will increase nine time between the first and third trial.