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Peptide bond formation is catalyzed by peptidyl transferase. The carboxyl end of the amino acid bound to the tRNA in this reaction and in the P site is uncoupled from the tRNA and becomes joined by a peptide bond to the amino set of the amino acid connect to the tRNA in the A site. A protein with peptidyl transferase activity has certainly not been isolated. The reason is now obvious; in E. coli at least, the peptidyl transfers activity is related with part of the 23S rRNA in the vast ribosomal subunit. Alternatively, peptidyl transferase is a ribozyme, a catalytic activity which resides in an RNA molecule.
Clinical Manifestations Early Symptoms Symptoms are episodic in nature or continuous with very little response to bronchodialators. Productive cough especially on awake
Sporozoans – Protozoan Sporozoans of the genus Plasmodium are responsible for causing a serious human disease, malaria. They are among, the best known parasites which live in
Taxonomic Hierarchy The sheer complexity of organisms seems so bewildering that some people believe, life to be unfathomable by the rational mind. Biologists constantly chip aw
Q. What is the valve that separates the aorta from the heart? What is the importance of that valve? The valve between the aorta and the left ventricle is the aortic valve. The
Q. What will happen without enough insulin? Without enough insulin two things can happen. Firstly, the cells of the body will be unable to use the glucose in the blood for ener
Cobalt Cobalt functions as a component of vitamin B12 (cobalamin). Ruminants are not dependent on a dietary source of vitamin B12 because ruminal microorganisms can synthesize B
Q. Do protozoans have a cellular nucleus? All protozoans, as eukaryotes have nucleus, some species like the paramecium have two nuclei the micronucleus and the macronucleus.
Explain Inotropes and Vasopressors Persisting hemodynamic instability after correction of hypovolemia would necessitate the use of vasoactive agents. Which drug or interventio
Bone Modeling It is a surface-specific activity (apposition or resorption) that produces a net change in the size and/or shape of a bone after initial bone formation in the emb
The main objectives of study of ecology are: (i) To study the distribution of biota local and geographical level. (ii) To study the interrelationship
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