What is considered to be the average natural mutation rate that occurs during DNA replication? One in every billion nucleotides replicated.
How does silent mutation occur?, Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene’s protein. … And when the amino acids of a protein stay the same, researchers believed, so do its structure and function.
Furthermore, Which of the following describes how 5 Bromouracil might create a mutation?, Which of the following describes how 5–bromouracil might create a mutation? It can replace the base thymine, and can base pair with guanine rather than adenine. … These thymines are then misread during the production of mRNA.
Finally, What kind of mutation is characterized by having no effect on the final protein?, Silent mutation: Some mutations that change DNA bases do not have any effect on the sequence of amino acids in the protein. These mutations are called silent mutations and they do not affect the structure or function of the protein because there is no effect on the amino acid sequence.
Frequently Asked Question:
Which of the following types of mutations creates a stop codon where one did not exist before?
Nonsense mutations, which are a severe type of base substitution, result in a stop codon in a position where there was not one before, which causes the premature termination of protein synthesis and, more than likely, a complete loss of function in the finished protein.
Which of the following types of mutations creates a stop codon?
In a nonsense mutation, a change in the genetic code leads to a STOP codon instead of an amino acid codon. Therefore the rest of the protein isn’t formed because the translation process is halted early by the STOP codon.
What is one possible result of a mutation within a stop codon?
How could a single nucleotide substitution result in a shortened protein product? A substitution that changed an amino acid codon into a stop codon would produce a prematurely terminated polypeptide.
What kind of mutation is characterized by having no effect on the final protein?
Silent mutation: Some mutations that change DNA bases do not have any effect on the sequence of amino acids in the protein. These mutations are called silent mutations and they do not affect the structure or function of the protein because there is no effect on the amino acid sequence.
Which of the following might result in a frameshift mutation?
Frameshift mutations arise when the normal sequence of codons is disrupted by the insertion or deletion of one or more nucleotides, provided that the number of nucleotides added or removed is not a multiple of three.
What kind of mutation is characterized by having no effect on the final protein quizlet?
Silent mutations do not change the amino acid sequence of the corresponding protein and are likely to have no effect on the organism’s fitness.
What is the effect of the mutation on the final protein?
Since the sequence of letters in a gene determines the sequence of amino acids in the protein it encodes, a point mutation can change the amino acid sequence of the resulting protein.
What is a mutation that has no effect?
Silent mutations are mutations in DNA that do not have an observable effect on the organism’s phenotype. They are a specific type of neutral mutation. The phrase silent mutation is often used interchangeably with the phrase synonymous mutation; however, synonymous mutations are not always silent, nor vice versa.
Do mutations always affect the final protein?
No; only a small percentage of variants cause genetic disorders—most have no impact on health or development. For example, some variants alter a gene’s DNA sequence but do not change the function of the protein made from the gene.
What best describes a mutation?
Mutations. Definition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
Which of the following would result in a frameshift mutation?
Frameshift mutations arise when the normal sequence of codons is disrupted by the insertion or deletion of one or more nucleotides, provided that the number of nucleotides added or removed is not a multiple of three.
Which of the following types of mutations creates a stop codon?
In a nonsense mutation, a change in the genetic code leads to a STOP codon instead of an amino acid codon. Therefore the rest of the protein isn’t formed because the translation process is halted early by the STOP codon.
Which of the following can cause thymine dimers to form in the DNA molecule?
Pyrimidine dimers are molecular lesions formed from thymine or cytosine bases in DNA via photochemical reactions. Ultraviolet light (UV) induces the formation of covalent linkages between consecutive bases along the nucleotide chain in the vicinity of their carbon–carbon double bonds.
What is a silent mutation example?
Silent mutations are base substitutions that result in no change of the amino acid or amino acid functionality when the altered messenger RNA (mRNA) is translated. For example, if the codon AAA is altered to become AAG, the same amino acid – lysine – will be incorporated into the peptide chain.
How frequently do silent mutations occur?
One in every billion nucleotides replicated. silent mutation. You just studied 96 terms!
How do you know if you have a silent mutation?
A silent mutation can be caused many ways, but the key point is that it does not change the function of the amino acid or subsequent proteins. A silent mutation is just that: it does nothing significant, not making a sound in the orchestra of the cell.
How can a mutation be neutral or silent?
This can occur if: A change in the nucleotide sequence does not result in a change in the corresponding amino acid. For example if a UUU codon is changed to a UUC codon, this would be a silent mutation because both UUU and UUC correspond to the amino acid phenylalanine.