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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.
How Poor Selection of Food causing the Underweight? Poor Selection of Food: Poor selection of food along with irregular eating habits may be responsible for insufficient food
The extracellular surface of the plasma membrane is frequently covered with a protective coat of carbohydrate. A Sugar residue of this carbohydrate coat can be
Define Free Solution or Moving Boundary Method? The first electrophoresis technique used in the study of protein was free solution or moving boundary method devised by Tselius
a) How do viruses enter plant body and spread to long distances within it? b) Mention any two ways by which viruses spread from single plant to another.
A cellular system has a total of 500 duplex voice channels. The service area is divided into 150 cells. Suggest a three different cluster size (N) values. In each case, determine
Explain briefly how computed tomography (CT) helps the doctors in pinpointing the defects in the patient's body
How does the inflammation mechanism work? When some tissue injury happens histamine and other vasoactive substances (known as mediators of inflammation) are released, they caus
Q What are the major cells of which poriferans are made? Sponges have their external wall covered by flat cells called pinacocytes and having pores well-delimited by special ce
Explain Irradiation The physical process of exposing an object, system, or a material to a high radiant energy for the sterilization or preservation.
Explain Rifamycins-Rifampin Rifamycins - Rifampin, like isoniazid, is potentially hepatotoxic, and gas- trointestinal disturbances, morbilliform rash and thrombocytopenic purpu
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