A mutation in a gene inserts one base. The first six codons read by the ribosome in
the RNA from the original gene and the mutant gene are shown below. In the original
gene, second codon encodes the amino acid Asn. What is true in the mutant gene?
RNA from original gene: 5'-AUG AAU AGC CUC CAU GCA -3'
RNA from mutated gene: 5'-AUG AAC UAG CCU CCA UGC A -3'
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In the mutant gene, the second codon still codes for Asn but the next
codon will cause translation to stop.
Which of the following is MOST likely to result in a nonfunctional polypeptide?
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, A nonsense mutation
Beneficial mutations are those that increase survival or reproduction in the prevailing
environment.
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True
Which of the following mutations would MOST likely have the most severe
consequence?
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Frameshift
If a codon in an mRNA is changed from GAC to GAU, what type of mutation results?
(Hint: See Table 4.1 for the codon table and Fig. 4.2 in the textbook for amino acid
structure. You'll want both tables handy for the final.)
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Synonymous
A point mutation that causes an amino acid replacement is called a:
the RNA from the original gene and the mutant gene are shown below. In the original
gene, second codon encodes the amino acid Asn. What is true in the mutant gene?
RNA from original gene: 5'-AUG AAU AGC CUC CAU GCA -3'
RNA from mutated gene: 5'-AUG AAC UAG CCU CCA UGC A -3'
Give this one a try later!
In the mutant gene, the second codon still codes for Asn but the next
codon will cause translation to stop.
Which of the following is MOST likely to result in a nonfunctional polypeptide?
Give this one a try later!
, A nonsense mutation
Beneficial mutations are those that increase survival or reproduction in the prevailing
environment.
Give this one a try later!
True
Which of the following mutations would MOST likely have the most severe
consequence?
Give this one a try later!
Frameshift
If a codon in an mRNA is changed from GAC to GAU, what type of mutation results?
(Hint: See Table 4.1 for the codon table and Fig. 4.2 in the textbook for amino acid
structure. You'll want both tables handy for the final.)
Give this one a try later!
Synonymous
A point mutation that causes an amino acid replacement is called a:
