6. Which of the following mutations would most likely have the severest consequences: Explain your reasoning. a. A change in amino acid recognition of an aminoacyl-tRNA synthetase b. A frame shift mutation at the end of the coding sequence of a gene c. A mutation at a splice junction
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A change in amino acid recognition of an aminoacyl-tRNA synthetase could potentially have severe consequences. This is because aminoacyl-tRNA synthetases are responsible for attaching the correct amino acid to its corresponding tRNA molecule during protein Show more…
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QUESTION 3 Which of the following types of mutations is MOST likely to alter the encoded protein? A single nucleotide deletion A point mutation in the 1st base of a codon A point mutation in the 3rd base of a codon A point mutation in the 2nd base of a codon QUESTION 4 What is an advantage of a degenerate genetic code? Mutations are more likely to alter proteins, increasing the rate of evolution. Mutations are less likely to alter protein sequence, decreasing the chances that a mutation will have deleterious consequences to the organism. It increases the number of different proteins that can be coded by each gene. It decreases the total number of tRNAs that have to be made.
Adi S.
A mutation that altered a single nucleotide within the anti-codon of a tRNA molecule could be expected to have which of the following consequences? The polypeptide amino acid sequence could be altered due to an incorrect amino acid bound to the mutant tRNA. This would be less likely to affect the amino acid sequence if the mutation occurred on nucleotide 1 or 2 of the anti-codon. The polypeptide amino acid sequence could be altered due to incorrect base-pairing between the mutant tRNA and mRNA codons. More than one option is possible.
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Describe some ways in which DNA is altered to cause mutations. What is the effect of a frameshift mutation on the amino acid sequence in the protein?
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