By: Dann Layler - 71994
The focus of the stem cell debate is whether the research destroys life, or could save it. Embryonic stem cells are harvested from developing embryos when there are about 140 cells in a hollowed balled structure called the blastocyst. In order to get to the...
By: Amelia Wagoner
Pseudomonas aeruginosa is a bacterium that has developed multi-drug resistance in many health care facilities. Resistance has arisen due to a low permeable outer cell membrane and the presence of efflux- pumping mechanisms. It is a problem particularly in patients with cystic fibrosis or burn...
By: Dean L. Sinclair
Cloning, as we are speaking here seems to be mainly concentrated on the idea of reproducing a being. To date much of the cloning attempts have been, like the first reported case of Dolly, the sheep, with the cloning of adult female animals. It is...
By: Angelika Reiter
The possibility of an alternative to DNA life formsIf you think that DNA is the only genetic material, think again. For it is widely believed among biochemists and molecular biologists that this predominantly DNA coded world that we currently live in was preceded by an...
By: Bayla Maya
Making a Difference with Stem CellsLocked inside a stem cell may be the secret of cures to come for many different diseases. It doesn't seem possible something which can provide hope could also be morally unaccepted. Even with the restrictions of the use of human...
By: Elizabeth Hedger
The process of duplication can be applied to segments of DNA ranging from individual structural or functional domains to entire genomes. Whatever the size of the duplicated region, a contribution can be made to evolution. Genes - and therefore proteins - can be extended, copied...
By: Elizabeth Hedger
Retrotransposons are DNA sequences that have the ability to move around the genome. They rely on the reverse transcription of RNA to DNA to move about the genome. In mammals retrotransposons fall into three classes: LTR retrotransposons (retrovirus-like elements), LINEs, and SINEs.LTR TEs are...
By: Elizabeth Hedger
DNA sequences in eukaryotes are classified according to the number of copies present in an average genome, which can range from one to more then ten thousand. The three main types are highly-repetitive, middle-repetitive, and single-copy sequences. Highly-repetitive DNA can be further classified as satellite...
By: Elizabeth Hedger
Pseudogenes, denoted by the Greek letter psi, are genes that were once functional, but that, due to mutations, have lost that function. Pseudogenes may be processed or non-processed. The former contain only exons, while the latter are copies of entire genes. Pseudogenes can arise from...
By: Christine Anderson
Modeling is a process used by scientists to assist in understanding the how the world works. Making models of molecules helps biologists and chemists define how the molecule is put together and predict the chemical nature of the molecule. James Watson and Francis Crick...

 

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