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DNA

DNA Science 7

TermDefinition
DNA deoxyribonucleic acid; contains information about an organism's growth and function
Franklin discovered large DNA spiral was made of 2 spirals
Watson & Crick created model of DNA molecule
sides of DNA ladder made of deoxyribose and phosphate molecule
rungs of DNA ladder guanine, cytosine, adenine, thymine
nitrogen bases guanine pairs with cytosine; adenine pairs with thymine
steps of DNA replication 1) enzyme separates DNA sides 2) new bases pair with bases on original DNA 3) two new identical DNA molecules are produced
RNA ribonucleic acid
Ways RNA and DNA differ 1) RNA has a half ladder 2) RNA has the base uracil instead of thymine 3) RNA contains sugar ribose
mutation any permanent change in DNA sequence of a gene or chromosome
causes of mutations outside factors such as xrays, sunlight, chemicals
Chromosome carries genetic information in the form of genes
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