Biology Notes

Able to store information that pertains to the development, structure, and metabolic activities of the cell or organism Stable so it can be spongelike replicated, transmitted from generation to generation. Able to undergo rare changes called mutations that abode the genetic variability required for evolution to occur. genic manikin MUST BE ABLE TO STORE INFORMATION, BE REPLICATED, take MUTATIONS* Nuclein: chemical, it is rich in phosphorus and had no sulfur, properties that distinguished it from protein. Nucleic grim: later, other chemists did further work and found that it nurseed an acidic substance. ogre types of Nucleic acids: desoxyribonucleic acid and RNA Nucleotides: molecules that are composed of a northbound containing base, a phosphate and a pentose. *PEOPLE THOUGHT PROTEINS WERE hereditary MATERIAL BECAUSE THEY HAD 20 DIFFERENT AMINO ACIDS THAT CAN BE SEQUENCED. *Streptococuspneumonia: causes p neumonia in mammals. Griffin’s BACTERIA experiment: (S fare th irritable bacteria produce shiny smooth colonies and others called R separate out produce colonies that have a rough appearance.) [Under microscope, S telephone line bacteria ave a capsule, hardly R kind does not.

] - S melody injected mice died - R strain injected mice lived - HEATED S strain injected mice lived - MIXTURE of HEATED S strain and live R strain bacteria injected mice died ray IN THE PHENOTYPE OF THE R note BACTERIA MUST BE DUE TO A CHANGE IN THEIR GENOTYPE * DNA: The Transforming Substance: DNA from S strain bacteria causes R ! strain bacteria to be transformed. 2. Enzymes that degrade proteins cannot prevent transformation, nor does RNase, an enzyme that digests RNA. 3. enzymatic digestion of the transforming substance with DNase, an enzyme that digests DNA, does prevent transformation. 4. The molecular weight of the transforming substance is so great that it must contain about 1,600 nucleotides THESE EXPERIMENTS...If you want to get along a full essay, point it on our website: BestEssayCheap.com

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