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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.
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How is the smoothing tendency of cornea functioned? Smoothing tendency: In health and in disease condition the epitheliurm has a strong tendency to smoothen the underlyin
How can germs can be transmitted Germs can be transmitted many ways, including: Touching dirty hands; Changing dirty or contaminated cloths; Through contaminated water and f
Q Concerning germ layers and the presence of coelom how are arthropods characterized? Arthropods are triploblastic and coelomate beings (they have three germ layers). Q. Co
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Question 1: (a) In what ways does poverty lead to environmental degradation? (b) What types of problems do the rural and urban poor share? Give some differences in the condi
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Q. Describe the complex spatial patterns of biodiversity? To describe the complex spatial patterns of biodiversity, ecologists and biogeographers have found it useful to expres
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