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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.
Q. What are some economic applications that can be generated by very biodiverse ecosystems? Extremely biodiverse areas present huge economic potential and they can be a source
Define Key Concepts and Facts of Polysaccharides? 1. All polysaccharides contain several monosaccharide units. 2. All monosaccharide units are joined to each other by glycosidi
which is the last enzyme in the thrombotic system?
What is the role of the ozone layer for living beings? Ozone, O3, is a gas of the atmosphere that filters ultraviolet radiation from the sun disallowing most of that radiation
Explain the Modes of Ventilation? In general, mechanical ventilation can be done to deliver a set tidal volume (volume controlled) or a set pressure (pressure controlled). Some
Water has key participation in organic reactions. What are examples of two types of organic reactions in which water is respectively incorporated or liberated in the products of th
Q. What are the three kinds of respiration in which the circulatory system transports gases? The circulatory system has an important role in branchial respiration, cutaneous re
If water dousing, homeopathic cures, and so on work for just me but not for anyone else, it is still science.
We mentioned earlier that pre-mating mechanisms are concerned with the prevention of occurrence of interspecific crosses. In such cases, a) the potential mates do not meet in wh
What is Phylum Nematoda - Roundworms? Nematodes are commonly known as the roundworms. They have a pseudocoelom type of body cavity, and they have a digestive tract that opens t
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