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16. In RNA splicing, noncoding regions of the mRNA, or the coding regions, or are removed and are joined together to produce an mRNA molecule with a continuous coding sequence. The use of different coding segments can result in the production of different mRNA molecules from a single gene, in a process called 17. In translation, polypeptide chain with the help of are added to a growing RNA (tRNA) molecules.
18. How do tRNA molecules accurately match mRNA sequences to amino acid sequences? 19. What is the start codon for translation? Which amino acid does it code for? A start codon signals the start of translation. Refer to the related link to see a chart of mRNA codons and their corresponding amino acids. 20. mRNA is read by the ribosome in the 5 to 3 direction, with polypeptides being synthesized in the Amino to Carboxyl direction. 21. Of the 2 types of point mutations (substitutions, insertions/deletions), which is more likely to be harmful and why?