Write the codon with correct polarity of all mRNA codons tha

Write the codon, with correct polarity, of all mRNA codons that will bind to the tRNA anticodon 5\' UCG 3\' considering wobble-base pairing rules. What is the minimum number of different aminoacyl-tRNA synthetases required by a cell? The genetic code uses three bases to encode one amino acid. Why can\'t the code use only two bases to encode each amino acid? Calculate how many amino acids you would be able to code for if the genetic code only used two nucleotides, and how many it\'s able to code with three nucleotiees. What happens when the ribosomal complex encounters a stop codon? Explain which, if any, tRNAs or proteins are involved. If the following DNA strand was used as a template, what would the sequence of an RNA be? 5\' GTACCGTC 3\'

Solution

1. Foe the given tRNA anticodon\" 5\'- UCG-3\', the mRNA will be 5\'- CGA-3\'.

The amino acid which codes for this codon is ARGININE.

Using the Wobble base pairing this codon will be, 5\'-CGA- 3\', 5\'-CGU- 3\', 5\'-CGG- 3\', 5\'-CGC- 3\'

2. Minimum number of amino acyl tRNA required by the cell is one.

3. If genetic code would be of two letter codons, the total number of amino acids would have been 4 raised to the power 2 , which would be 16 (4*4). But Actually the number of amino acids are 20, therefore two letter codpon is not accepted.