Most nonsense mutations in a structural gene for a protein have a null phenotype. How many...
Most nonsense mutations in a structural gene for a protein have a null phenotype. How many different single base substitution mutations in a protein coding sequence can produce a nonsense mutation?
Homework Answers
The nonsense mutations are basically a type of point mutation within the DNA sequence that forms a pre-mature stop codon and terminates the transcribed mRNA. It leads to production of incomplete and truncated product which is non functional. One single base substitution mutation is enough in a particular protein coding sequence to produce the non-sense mutation. It is a type of point mutation which leads to entry of a stop codon and hence leads to stopping of the transcription of the mRNA.
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Most nonsense mutations in a structural gene for a protein have
a null phenotype. How many...
One way mutations can affect the phenotype is by altering the coding sequence of a gene...
One way mutations can affect the phenotype is by altering the coding sequence of a gene and therefore changing protein structure. Please describe two ways that mutations can affect the phenotype that does not include alteration of the protein coding sequence
1. Which of the following mutations is the most likely to be neutral? A) A nonsense...
1. Which of the following mutations is the most likely to be neutral? A) A nonsense mutation in exon 5 of a gene with 39 exons. B) A splice site mutation in intron 3 of a gene with 8 introns and 9 exons. C) A single nucleotide insertion in exon 7 of a gene with 18 exons. D) A thee nucleotide deletion in exon 1 of a gene with 7 exons.
Which of the following statements regarding gene mutations is NOT true? Conditional mutations have different phenotypic...
Which of the following statements regarding gene mutations is NOT true? Conditional mutations have different phenotypic effects under different conditions and can be used to study the function of essential genes. Silent mutations cannot have any phenotypic effect on an organism. Frameshift mutations often result in a truncated protein product, similar to a nonsense mutation. Dominant mutations have a phenotypic effect despite the presence of one functional wild type allele.
How many different mutations can result from a single base pair substitution in the unique tryptophan...
How many different mutations can result from a single base pair substitution in the unique tryptophan codon? Classify each as silent, missense, or nonsense.
Explain what classifies a mutation as “temperature‑sensitive” by comparing phenotype(s) with a wildtype allele. How is this type of phenotype explained by protein behaviour? Would the following typ...
Explain what classifies a mutation as “temperature‑sensitive” by comparing phenotype(s) with a wildtype allele. How is this type of phenotype explained by protein behaviour? Would the following types of mutations most likely have: severe effects, mild effects, or no effect on protein function? Briefly explain your answers. Note that there may be more than one correct answer, but you need only to give one sensible answer and explain your reasoning. [6 marks] A nonsense mutation occurring in sequences encoding amino...
Which of the following mutations would be most likely to have a harmful effect on an...
Which of the following mutations would be most likely to have a harmful effect on an organism? (A) a deletion of three nucleotides near the middle of a gene (B) a single nucleotide deletion in the middle of an intron (C) a single nucleotide deletion near the end of the coding sequence (D) a single nucleotide insertion downstream of, and close to, the start of the coding sequence In this problem, why (c) cannot be the answer?? Single nucleotide deletion...
A cell that is heterozygous for a nonsense mutation in a tumor suppressor gene would most...
A cell that is heterozygous for a nonsense mutation in a tumor suppressor gene would most likely: A) Group of answer choices B) grow but not divide C) have a normal cell cycle D) arrest and induce apoptosis E) have a slightly increased cell cycle and increased cell growth F) grow and divide uncontrollably Which of the following correctly describes an event that occurs during transcription: Group of answer choices A) A DNA molecule is chemically modified to become a...
please help 6. How can a missense mutation-such as in sickle cell disease-result in a protein...
please help
6. How can a missense mutation-such as in sickle cell disease-result in a protein that has an abnormal structure? Some of these mutations are lethal or cause serious disease, such as cystic fibrosis and sickle cell disease. Many of these point mutations that cause genetic disorders occur as a result of errors in DNA replication or crossing over. 7. What will be the consequence if a single base is deleted from the coding region of a gene?
macmilan learming geneticist identify with the G-banding technique? Which mutations can a a nonsense mutation introducing...
macmilan learming geneticist identify with the G-banding technique? Which mutations can a a nonsense mutation introducing a premature stop codon into a gene on chromosome 5 a single nucleotide substitution in which T replaces G on chromosome 2 a deletion of half of the long arm of chromosome 20 the long arms from two homologous chromosomes undergo a translocation an inversion of the short arm of chromosome 18
1) Which of the following mutations could result in a frameshift? A) a base insertion B)...
1) Which of the following mutations could result in a frameshift? A) a base insertion B) a base deletion C) a base substitution D) either A or B E) A, B, and C 2) Which of the following point mutations would be most likely to result in a non-functioning protein? A) a single base substitution in an intron B) a single base deletion near the end of the coding sequence C) a single base deletion in the codon following the...
1. Which of the following mutations is the most likely to be neutral? A) A nonsense mutation in exon 5 of a gene with 39 exons. B) A splice site mutation in intron 3 of a gene with 8 introns and 9 exons. C) A single nucleotide insertion in exon 7 of a gene with 18 exons. D) A thee nucleotide deletion in exon 1 of a gene with 7 exons.
please help
6. How can a missense mutation-such as in sickle cell disease-result in a protein that has an abnormal structure? Some of these mutations are lethal or cause serious disease, such as cystic fibrosis and sickle cell disease. Many of these point mutations that cause genetic disorders occur as a result of errors in DNA replication or crossing over. 7. What will be the consequence if a single base is deleted from the coding region of a gene?
macmilan learming geneticist identify with the G-banding technique? Which mutations can a a nonsense mutation introducing a premature stop codon into a gene on chromosome 5 a single nucleotide substitution in which T replaces G on chromosome 2 a deletion of half of the long arm of chromosome 20 the long arms from two homologous chromosomes undergo a translocation an inversion of the short arm of chromosome 18
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