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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.
What is the neurotransmitter of the neuromuscular junction? How does the nervous system trigger muscle contraction? The nervous cells that trigger the muscle contraction are th
Roles of Abscisic Acid Abscisic acid (ABA) is a particularly interesting hormone with regard to the regulation of its own levels. Its levels rise and fall dramatically in seve
Energy Loss - Energy Flow Let us now take the second point that is the loss of some energy at each trophic level. You might recall that the second law of thermodynamics states
Q. Describe Lipoprotein? Ans. There is considerable current interest in this lipoprotein, which consists of LDL with an additional apoprotein-apoprotein (a) attached to it
Explain Precautions for Estimation of Sucrose by Fehling Soxhlet Method? 1. Maintain proper temperature of the water bath for complete hydrolysis. 2. Add distilled water to
Explain Transfer from Solid Culture to Liquid Media The steps involved in this technique are included herewith: 1. Sterilized inoculating loop or needle is touched carefully
DNA
Q. What are the enzyme cofactors? Some of enzymes require other associated molecules to work. These molecules are known as enzyme cofactors and they can be, for example, organi
What is Centrioles in cell structure? Most cells of higher organisms contain pairs of cylindrical bodies called centrioles, which help to organize microtubules in cell division
What is digestion? Digestion is the breaking down of larger organic molecules obtained from the diet, e.g. carbohydrates, fats, proteins, into smaller ones, as glucose, fatty a
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