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w History Bookmarks People Window Help ing.com/ibiscms/mod/íibis/view.php?id-4848304 !: W MyUNiverse CAS-Central A the . Sapling Learning 1 c.. M McGraw-Hill Con lor ld Synonyms w. Jump to... Question 20 of 23 Map Sapling Learning Some mutations do not affect the amino acid sequence of the protein produced using the mutated gene. How can the correct amino acid be incorporated into the protein despite a mutation in the gene sequence? Some mutations are detected and corrected as the pre-mRNA is being synthesized. Enzymes correct many of the mistakes in the amino acid sequence after the protein is made. Only the first of the three nucleotides ia codon is used to determine the correct amino acid. The amino acid specified by the mutated codon may be unchanged by the mutation. O O O Previous Check Answer Next Exit about us careers privacy policy terms of use contact us help

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Answer: Choice 1

Explanation: The proof-reading and correcting ability of the RNA polymerase makes it possible to correct the faults in the mRNA transcription and further ensuring that the correct amino acid has been synthesized during translation ensures that no faulty translation takes place despite the fact that there is mutation in the genes. However, this process is unlikely to take place routinely during transcription. On the other hand, the fact that many codon sequences encode for a single amino acid makes it possible to not generate any major change in the protein structure further ensure that even if there is a mutation in the gene, there might not be any major change in the protein sequence.

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