The mitochondrion (plural mitochondria) is a organelle found in most eukaryotic cells.
Substitution mutation is when a single base pair in a strand of DNA is replaced. This can cause an early stop amino acid, or the protein could change slightly, or the protein could be unchanged completely due to there being multiple base pairs to make an amino acid.
When water freezes(ice) it expands slightly
think ice cube tray, and why the amount of ice you get is more than the amount of water you put in<span />
Contains ribosomes
Responsible for protein synthesis
I hope this helps :)
