| A | B |
|---|
| DNA | deoxyribonucleic acid; a chemical containing the info for an organism's growth and function; stored in cell's nucleus.all cells have this |
| structure of DNA | twisted ladder model made by Watson and Crick |
| content of DNA | sugar, phosphates and nitrogen bases |
| nitrogen bases | form rungs of DN A ladder: adenine, guamine, cytosine, thymine |
| pairs of nitrogen bases | cytosine always pairs with guanine, adenine always pairs with thymine |
| gene | instructions for making a specific protein, a section of DNA on chromosome...each chromosome contains hundreds of genes |
| ribosomes | where proteins are made in cytoplasm |
| RNA | ribonucleic acid, carries code for making proteins from nucleus to ribosomes, looks like ladder with rungs sawed in half, each cell only makes the proteins it needs |
| mutation | any permanent change made in the DNA sequence of a gene or chromosome which is a mistake in protein formation; some mutations cause the organism to die, others are beneficial because they help the organism survive |
| types of RNA | Messenger RNA, Ribosomal RNA, Transfer RNA |
| thymine | chemical not shared by DNA and RNA |
