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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.
A protein is normally found completely within the inside of a lipid bilayer. The protein likely has: a) Mostly hydrophobic side chains, pointed outwards, with the peptide backbo
NUCLEUS First described and christened by Robert brown 1831, a nucleus is the largest and most important organelle of eukaryotic cells. It is membrane bound and generally locat
a) What process is responsible for the movement of carbon dioxide into a leaf? b) In what conditions might the same process cause oxygen to enter a leaf? (a) Diffusi
PHYSIOLOG Y OF RESPIRATION - 1 . EXCHANGE OF GASES - It is Haemotasis. It takes place in Alveoli between alveolar air and arterial cappilary by diffusion i.e., f
how does autophagy help in converting a tadpole larva into an adult amphibian
Explain Pasteurization The act or process of heating a beverage or other food, to a specific temperature for a specific period of time in order to kill microorganisms that cou
Agroup of realated genera are classified as-?
Some people have disbeliefs regarding insulin injection. You have to find out if there are any disbeliefs and try to explain the importance of insulin injection. Do not force the p
in oogenesis only on functional egg cell is normally formed from primary oocyte. Briefly explain
All of the electron carrier in the electron transport chain interact according to their redox potentials. Every time whereas an electron transfers occurs, the accepting carrier ha
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