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Which of the following is not possible?
a. A nonsynonymous mutation in an intron
b. A nonsynonymous mutation in an exon
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- A nonsynonymous mutation is also referred to as missense mutation. Which of the following correctly describe these mutations? They are permanent and cannot revert or reverse mutate back into a wild-type sequence. They cause a non-functional amino acid to replace a functional amino acid. O They result in the insertion or deletion of a small number of nucleotides to the DNA. They change the nucleotide sequence of a gene but do not change the sequence of the resulting protein. None of the provided answers are correct. They convert a codon for a particular amino acid within a gene into a stop codon. They insert an additional amino acid into the final protein product.explain why a mutation in the dna nucleotide sequence that corresponds to the 3rd nitrogen base in the mrna codon is not as serious as a mutation in the dna that corresponds to the first nitrogen base in the mrna codonWhich of the following statements about a transversion mutation in the sequence AGC is true? It could result in a single base substitution to give the new sequence AGT. A transversion mutation in the sequence AGC would always be silent. sequencelt could result in a single base substitution to give the new codon GGC. It could result in a single base substitution to give the new sequence AAC. It could result in a single base substitution to give the new sequence AC.
- Sickle-cell hemoglobin differs from regular hemoglobin in just one amino acid. Normal hemoglobin is created from the codon GAA, which codes for glutamic acid while sickle-cell hemoglobin has the codon GUA, which codes for valine. This is an example of what type of mutation? * O Insertion O Silent mutation O Deletion O Substitution mutationWhich of the following statements about a transition mutation in the sequence CGG is true? sequenceIt could result in a single base substitution to give the new codon CCG. It could result in a single base substitution to give the new sequence AGG. It could result in a single base substitution to give the new sequence TGG. A transition mutation in the sequence CGG would always be silent. It could result in a single base substitution to give the new sequence GGG.A reversion is a mutation that returns a mutant codon back to acodon that gives a wild-type phenotype. At the DNA level, this typeof mutation can be an exact reversion or an equivalent reversion. An equivalent reversion produces a protein that is equivalent to thewild-type protein in structure and function. This outcome canoccur in two ways. In some cases, the reversion produces thewild-type amino acid (in this case, glutamic acid), but it uses adifferent codon than the wild-type gene. Alternatively, an equivalentreversion may substitute an amino acid structurally similarto the wild-type amino acid. In our example, an equivalent reversionhas changed valine to an aspartic acid. Because aspartic andglutamic acids are structurally similar—they are acidic aminoacids—this type of reversion can restore wild-type structure andfunction.Here is the question: The template strand within the codingsequence of a gene has the following sequence:3′–TACCCCTTCGACCCCGGA–5′This template produces the…
- Which type of mutation is most likely to be silent? An inversion A deletion An insertion OA substitutionHydrogen bonds are important in DNA replication and transcription. They are relatively weak chemical bonds. Why is this a desirable feature for DNA? Describe the effect (s) of changing (mutating) the promoter on the transcription of the DNA strand/gene the promoter controls. What happens to protein synthesis if a nonsense codon is inserted into the gene? Explain why a point mutation does not necessarily change the original amino acid sequence. (Explain silent mutations) Choose any pentapeptide composed of five different amino acids. List the amino acids. Present one messenger RNA codon for each amino acids and the sequence of nucleotides on the DNA that originally coded for your pentapeptide.You may wish to consult the genetic code above to answer the following question. A mutation has changed a portion of a protein coding gene that encodes a messenger RNA sequence. The original messenger RNA sequence is 5-AUGCCCAGAGCU-3' Which mutation is a nonsynonymous (missense) mutation that changes a single amino acid in the encoded protein? O 5-AUGCCCAGGGCC-3' O 5'-AUGCCCUGAGCU-3' O 5'-AUGCCCACAGCU-3 5'-AUGCCCCAGAGCU-3
- A polypeptide has the following amino acid sequence: Met-Ser-Pro-Arg-Leu-Glu-Gly The amino acid sequence of this polypeptide was determined in a series of mutants listed in parts a through e. indicate the type of mutation that occurred in the DNA (single-base substitution, insertion, deletion) and the phenotypic effect of the mutation (nonsense mutation, missense mutation, frameshift, etc.). a. Mutant 5: Met-Ser-Pro-Arg-Leu-Leu-Glu-GlyA polypeptide has the following amino acid sequence: Met-Ser-Pro-Arg-Leu-Glu-Gly The amino acid sequence of this polypeptide was determined in a series of mutants listed in parts a through e. indicate the type of mutation that occurred in the DNA (single-base substitution, insertion, deletion) and the phenotypic effect of the mutation (nonsense mutation, missense mutation, frameshift, etc.). a. MMutant 4: Met-Ser-Pro-Glu-GlA polypeptide has the following amino acid sequence: Met-Ser-Pro-Arg-Leu-Glu-Gly The amino acid sequence of this polypeptide was determined in a series of mutants listed in parts a through e. indicate the type of mutation that occurred in the DNA (single-base substitution, insertion, deletion) and the phenotypic effect of the mutation (nonsense mutation, missense mutation, frameshift, etc.). a. Mutant 2: Met-Ser-Pro