| A | B |
|---|
| polar molecule | molecule with an unequal distribution of charge, resulting in the molecule having a negative and positive end |
| hydrogen bond | weak chemical bond formed by the attraction of positively charged hydrogen atoms to other negatively charged atoms |
| amino acid | basic building blocks of proteins |
| carbohydrates | organic compound used by cells to store and release energy; composed of carbon, hydrogen and oxygen |
| enzyme | type of protein in all living things that changes the rate of chemical reactions |
| lipids | large organic compounds made mostly of carbon and hydrogen with a small amount of oxygen |
| nucleic acids | complex biomolecules such as RNA and DNA that store cellular information in cells in the form of a code |
| nucleotides | subunits of a nucleic acid formed from a simple sugar, phosphate group, and base |
| peptide bond | covalent bond formed between amino acids |
| polymer | large molecule formed when many smaller molecules bond together |
| proteins | large complex polymer essential to all life composed of carbon, hydrogen, oxygen, and nitrogen and sometimes sulfur; provides stucture for tissues and organs and carrry out cells metabolism |
| pH | measure of how acidic or basic a solution is |
| acid | any substance that forms hydrogen ion in water and has a pH below 7 |
| base | any substance that forms hydroxide ions in water and has a pH above 7 |
