biology.q36(507-511)
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Created by:
jennabirdy on April 28, 2011
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16 terms
Terms | Definitions |
|---|---|
 deoxyribonucleic acid (DNA) | a substance in a cell that controls heredity |
| nucleic acid | acid found in the nucleus of a cell |
| james watson and francis crick | biochemistists who discovered the real nature of DNA |
| gene | unit of genetic information |
| chromosomes | there are 46 of these in a somatic cell; each one contains one molecule of DNA |
| chromatin | long, loose loops of DNA |
| double helix | the double-spiral stucture of a DNA molecule |
| four types of bases of a DNA molecule | guanine, cytosine, adenine, thymine |
| replication | the process by which DNA makes a copy of itself before cell division |
| transcription | the cell copies information in the DNA and puts into mRNA |
| translation | the mRNA provide info to the ribosomes to make protein molecules |
| histones | protein spools that short segments of DNA are wrapped on |
| nucleosomes | groups of eight histones cluster together to form these |
| riboneucleic acid (RNA) | another nucleic acid |
| nucleotides | DNA and RNA are composed of these molecules |
| base pairing | the process in which only one type of base will fit another |
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