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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.
1. You are observing adsorption of a virus to the host cell, it uses long leg-like structures, what are they called?
phases of alpha taxonomy
GROWTH RATE IN ANIMALS - Growth rate is different at different periods of life. Growth period in human may be studied in 5 steps - (i) Prenatal - In gestation period fo
Describe about Investigative Tools and their Optimal Use ? The investigative tools that are available for diagnosis of CHD include ECG, chest X-ray, 2D and Doppler echocardiog
Embryology: Embryology (from Greek words embryon which means unborn embryo and logia which means study) is a branch of science which deals with the development of an embryo starti
There are several anaplerotic reactions required to replenish intermediates of the TCA cycle. All of the following compounds can be used for these anaplerotic reaction except: -
Q. What are the three kinds of protein fibers of the connective tissue proper? The matrix of the connective tissue proper is made of elastic fibers, collagen fibers and reticul
Consider a time when the membrane voltage of a SA node cell in the heart is at its minimum value (near -80 mv). At this time, A. all the voltage-gated calcium channels will be
Which are specialized conductive tissues of the plants? Vascular tissues of the plants are the phloem and the xylem. The Xylem is the plant tissue that forms the vessels that c
What are the predominating chemical compounds respectively in eggshell, white and yolk? The eggshell is essentially made of calcium carbonate. The white, or albumen, is compose
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