2007-01-12 07:54:15 · 8 answers · asked by Mickey 1 in Science & Mathematics ➔ Biology
I can take DNA, treat with RNAse to destroy contaminating RNA, purify it to be free of protein (including the RNAse just to be safe), and verify that by spectrophotometer to be protein free.
I can then electroporate that DNA into E. coli and a new phenotype from the E. coli such as ampicilin resistance(matching the same phenotype from the source of the DNA). I can also electroporate E. coli with no DNA to demonstrate that the electricity is not causing the change in phenotype.
I can repeat the above samples, but treat with DNAse instead of RNAse and demonstrate no transformation of the E. coli to the new phenotype.
2007-01-12 08:17:36 · answer #1 · answered by John V 4 · 0⤊ 0⤋
Whenever you have a model for how something works, then the proof of how good the model is, is can you use to predict how experiments will work out. The DNA model not only is a great explanation for MANY different observations about biology and reproduction, but when we use DNA as a model for designing new experiments and lab procedures and manufacturing procedures, it works extremely well. A model that works well is almost certain to be 'true.'
2007-01-12 08:04:18 · answer #2 · answered by matt 7 · 0⤊ 0⤋
Look at identical twins. They have the same DNA and exact same features (at birth, at least). Therefore, DNA contains hereditary info. Besides, if you truly understood protein synthesis, you would realise that it only makes sense.
2007-01-12 08:01:11 · answer #3 · answered by Anonymous · 2⤊ 0⤋
If I remember, experiments were done with viruses.
Viruses, as you know, contain hereditary material.
A virus was found that would transform a bacterium. It consisted only of nucleic acid and protein.
Through radioactive labelling, it was demonstrated that the transforming factor was the nucleic acid.
2007-01-12 08:44:32 · answer #4 · answered by Anonymous · 1⤊ 0⤋
cause its been proven by science..
parents.. and their offspring have similar DNA .. as well do sibilings..
not identicial but similar enough ..
also the same goes for bacteria.. it splits.. but stil the same DNA is passed on
2007-01-12 07:58:44 · answer #5 · answered by steph 6 · 1⤊ 0⤋
My best friend invented genetic engineering, and has received fame and fortune for doing so. Her techniques for manipulating DNA are recognized around the world, and have resulted in sales of genetically modified crops of billions of dollars a year. I infer that you have skepticism, let me assure you that DNA is absolutely a done deal, and anyone who knows anything about science will tell you so.
2007-01-12 08:00:25 · answer #6 · answered by Anonymous · 1⤊ 4⤋
cloning ... DNA is the only thing that's passed into the new embryo cell.
2007-01-12 07:56:48 · answer #7 · answered by Anonymous · 1⤊ 0⤋
Go to " Hersey-Chase experiment " at wikipedia for that information.
2007-01-12 09:07:20 · answer #8 · answered by Anonymous · 1⤊ 1⤋