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You've already mentioned rRNA. An interesting review (Tanner, 2006), outlines some more: Group I Introns - self-splicing; "They are abundant in fungal and plant mitochondria..." Group II Introns - some have been shown to self-splice; "...they are found in fungal and plant mitochondria, in chloroplasts of plants, in algae, in eubacteria and especially in ...


7

The RNA world hypothesis states that self-replicating RNA (that is, an autocatalytic RNA polymerase) was the first form or precursor of life. So, in that context, your question is basically asking how life originated. The obvious answer is that we don't know (currently anyways), but I'm going to take this opportunity to describe a few really neat experiments ...


0

I don't know if this is helpful in the context of moving from RNA to DNA world, but I do know that certain mutations to T7 RNA polymerase will allow that enzyme to use 2' deoxy nucleotides in addition to the normal ribonucleotides. These mutations were discovered by humans engineering the enzyme, but it's feasible that some transitional enzyme could have ...


1

According to the Gilson Pipettman User Guide you can autoclave the following parts: Tip ejector, Tip holder and the connecting nut (have a look into the PDF linked above if you are not sure about the parts). All other parts can not be autoclaved. Gilson says the following conditions can be used (page 17 in the user guide): Autoclave for 20 minutes at 121°C, ...


0

Yes, this is true. This flow of information is called the "Central dogma of Molecular Biology". It basically describes the flow of information from DNA to RNA to proteins. Since a virus needs to amplify its genetic information before it can take over the infected cell and make only viral proteins and its genetic information, it has two possible options. DNA ...



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