| A | B |
|---|
| protein | made of amino acid |
| pH scale | ranges from 0-14 |
| element | composed of one type of atom |
| lipids | fats,oils |
| neutral | pH=7 |
| atomic number | number of protons |
| nucleic acid | DNA and RNA |
| enzyme | proteins that speed up chemical reactions |
| ion | a charged atom |
| carbohydrate | used as a source of energy |
| ionic bond | a bond formed when one atom gives up an electron and one accepts an electron |
| acid | ranges from 0-6.9 |
| covalent bond | bond formed when atoms share electrons |
| atom | smallest particle of matter |
| matter | occupies space and has mass |
| base | ranges from 7.1-14 |
| active site | place on enzyme where the subtrate attaches |
| subtrate | substance the enzyme changes |
| organic compound | made of carbon |
