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Microbiology 9th Edition by Laura Black, Jacquelyn Black
Edition 9ISBN: 9781118934753Microbiology 9th Edition by Laura Black, Jacquelyn Black
Edition 9ISBN: 9781118934753 Exercise 8
Suppose a point mutation occurred in the third position of a codon in a DNA template coding for a protein, changing it from TTT to TTC. What would be the consequences of this mutation?
(a) It would cause a frameshift mutation downstream of the point mutation, resulting in a different protein.
(b) It would cause a different amino acid to be placed at this position in the polypeptide, making it a mutant protein.
(c) There would be no change in the amino acid at this position because, of the redundancy of the genetic code. Such point mutations are known as ''silent mutations'' because, although the genotype is different, the pheno type remains the same.
(d) All of the above.
(e) None of the above.
(a) It would cause a frameshift mutation downstream of the point mutation, resulting in a different protein.
(b) It would cause a different amino acid to be placed at this position in the polypeptide, making it a mutant protein.
(c) There would be no change in the amino acid at this position because, of the redundancy of the genetic code. Such point mutations are known as ''silent mutations'' because, although the genotype is different, the pheno type remains the same.
(d) All of the above.
(e) None of the above.
Explanation
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When point mutation has occurred, at the...
Microbiology 9th Edition by Laura Black, Jacquelyn Black
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