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Because RNA is composed of four parts of nucleotides, there are 43 = 64 possible codons, which is 64 possible triplets of nucleotides with several sequences. Furthermore, only 20 amino acids are commonly found in proteins so which, in most cases, a one amino acid is coded for through various dissimilar codons described in the figure. The genetic code is thus said to be degenerate. In reality, only methionine and tryptophan are shown by a single codon. As a conclusion of the genetic code's degeneracy, a mutation which changes only a single nucleotide in
Figure: The genetic code.
DNA point mutation, and thus changes only a single nucleotide in the corresponding mRNA, frequently has no effect on the amino acid sequence of the encoded polypeptide.
An increase in the calcium conductance of all sarcoplasmic reticulum membranes of a skeletal muscle with no external forces on it leads to A. an increase in the amount of calci
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How does the metachronal waves form in the ciliary row of protozoa ? Explain the cilia beating mechanism associates with it.
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What is Erythropoietin (EPO) A. is secreted by peritubular interstitial cells of the kidney cortex. B. acts by increasing the production of red blood cells by cells in
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