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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.
Strobilation - Types of Asexual Reproduction Strobilation is a type of asexual reproduction in which successive segments are separated off from the body one after other. It is
How do bacteria reproduce? Bacteria replicate by binary fission (scissiparity). Some bacteria though present a kind of sexual reproduction (transformation, transduction or conj
The feasible methods of stabilization within the constraints of retaining natural status: Complex formation: Anthocyanin occurs naturally as complexes which are relatively st
Cytoplasmic bridge formed during the conjugation of paramoec: The two paramoecia that undergo conjugation are called conjugants. During conjugation, the two conjugants com
Which type of chemical bond maintains the pairing of each chain in the DNA molecule? Ans) To form the DNA molecule, purine bases bind to pyrimidine bases by intermolecular bonds
Development of Reserves - Conservation of Wildlife Establishment of Biological reserves, National parks, Forest reserves, Wildlife refuges and Biosphere reserves are effective
Q. What is the difference between the beta-sheet and the alpha-helix protein conformations? Beta-sheet and Alpha-helix conformations are the two main types of secondary structu
Explain the working of antioxidant function? The antioxidant function depends on the number of hydroxyl groups and their positions. Among the various derivatives, flavonoids ar
brief account on classification and general characters of protozoa
Glycogen synthesis and degradation in the liver and muscle is very similar. Which of the following enzymes is not used in both muscle and liver for these metabolic pathways? -ph
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