The polypeptide consists of 27 amino acids. Determine the number of nucleotides in the region of the gene that encodes the primary structure of this polypeptide, the number of codons per m-RNA corresponding to these amino acids, and the number of t-RNA molecules involved in the biosynthesis of this polypeptide.
1) the genetic code of DNA is triplet, therefore, the region of the DNA gene encoding a polypeptide of 27 amino acids contains 27 x 3 = 81 nucleotides;
2) the informational part of the i-RNA contains 27 codons (the codon includes three nucleotides);
3) for the biosynthesis of this polypeptide, 27 t-RNA molecules are needed, since one t-RNA transports one amino acid to the site of protein synthesis.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.