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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.
Measures of Evenness The maximum Shannon-Wiener index for a given number of species can be calculated as: The minimum Shannon-Wiener index for a given data set can be c
The following progeny genotypes were observed: 73 AaBb, 64 aabb, 279 Aabb, 303 aaBb. Using a chi-square test, test whether these two loci show independent assortment? How would
Cover (area occupied) - Quantitative Characters Cover or specifically herbage cover refers primarily to the area of ground occupied by the leaves, stems and inflorescence i.e.
Cohesion-adhesion theory describes the properties of water which help move it through the plant. Cohesion is the property of water molecules to stick together (held by hydrogen bo
List the routine treatment sequence for an implant patient. The different phases are - Preliminary treatment - Stage I surgical phase - Stage II surgery and Prosthetic
Can someone describe the fundamental aspects of protein structure? I'm already familiar with the amino acid structure, I just don't have a clear conceptual understanding of protein
Percussion - criteria for endosteal implants? It is neither an indicator of clinical health nor of rigid fixation. Ringing sound that occurs on percussion corresponds to the pr
Viral haemorrhagic fevers (VHF) Viral haemorrhagic fevers (VHF) are caused by a diverse group of viruses belong to the families Arenaviridae, Bunyaviridae, Filoviridae and Fla
What are mycorrhizas? How does each participant benefit in this ecological interaction? Mycorrhizas are mutualist ecological interactions among fungi and some plants roots. Fun
Q What are instances of a carnivorous and an herbivorous reptile? Iguanas are herbivorous, Snakes are carnivorous. Q. Do beings of the class Reptilia perform gas exchange i
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