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In at least single eukaryote, Tetrahymena, the pre-rRNA molecule holds an intron. Erasing of the intron in running processing of the pre-rRNA does not require the assistance of any protein! Instead, in the presence of guanosine, GDP, GMP or GTP, the intron excises itself is a phenomenon known as self- splicing. This was the first expression of ribozymes, which is, catalytic RNA molecules which catalyze particular reactions. The Self-splicing introns have also been discovered in some eukaryotic mRNAs and even peptidyl transferase a main activity in protein synthesis is now known to be a ribozyme.
What is Periotest Periotest: An electronic device originally developed by Schulte designed to measure the dampening effect or attenuation degree characteristics of the peri
Define influence of polyphenols on Carbohydrates? Binding of proteins may indirectly affect carbohydrate absorption. Inhibition of amylolytic enzymes and subsequent reduction o
The classification was given by Spaulding and is based on the contact with different tissue types to determine whether sterilization or disinfection is needed. 1. Critical item
expanciate the process of oxygen and carbon dioxide exchange in sponges
Growth Regulators Besides the major five hormones, polyamines can also exert regulatory control over growth and development at micromolar concentrations. They are widespread a
why does the monohybrid always result in a 1:2:1 ratio?
How did muir's impression of man's relationship with nature differ from Susan Fenimore coopers? And How did Gifford Pinchot view nature?
HUMA N CHROMOSOMES The normal diploid (2N) chromosome number in human being is 46. It was given by T.H. Tjio and A. Levan in 1956. The chromosome complement of a cel
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Origin of Regeneration Cells of Blastema The origin of the cells making the blastema in vertebrates has been investigated by various workers in the case of regenerating legs
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