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A molecule of mRNA with the sequence GGUCAUCACUAU experienced a point mutation that caused the sequence to become GGUUAUCACUAU. Which of the following terms describes this type of mutation?
The mutation described is a "silent mutation." This term is used because the change from G to U in the second position of the sequence does not alter the resulting amino acid due to the redundancy in the genetic code. Specifically, both GGU and GGU (the original and mutated sequences) code for the same amino acid, glycine. Therefore, the mutation does not affect the protein's sequence or function.
A gene has the base sequence CGT AT. Give an example of a frameshift mutation on this gene.?
A frameshift mutation occurs when nucleotides are added or deleted from the DNA sequence, causing a shift in the reading frame. For example, if we delete the first base 'C', the new sequence would be GT AT, which changes the entire downstream sequence and potentially alters the resulting protein. Alternatively, if we insert an 'A' at the beginning, the sequence would become ACGT AT, also shifting the reading frame and affecting the translation of the gene.
If the dNA sequence Tgagccatga is change to tgagcacatga what kind of mutation has occurred?
The sequence TGA-GCC-ATG-A is changed in 2 places to become TGA-GCA-CAT-GA.When one base is changed, it is called a point mutation.In this case, a GCC in the DNA has been changed to a GCA. This would mean the mRNA codon (coded for by this DNA) would change from CGG to CGU.Both of these codons code for the same amino acid - Arginine. Therefore this type of point mutation is known as a silent mutation.The extra C that appears would be called an addition mutation, which is a type of frameshift mutation.
How a gene mutation can result in the production of an ineffective enzyme?
A gene mutation can alter the DNA sequence that codes for an enzyme, potentially changing its amino acid sequence and disrupting its structure. This structural change may impair the enzyme's ability to bind to its substrate or catalyze a reaction efficiently. As a result, the enzyme may become ineffective, leading to a disruption in metabolic processes and potentially causing various health issues.
Can anyone become a mutant by mutation?
The only way to become a mutant is via a mutation, but a mutation does not guarantee a unique phenotype. (I'm assuming, here, that you're using a biological definition of "mutant" and not a more fanciful definition.)
What kind of mutation is this ugu-ccg-GAA-cga to ugc-cgg-GAA-cga?
The sequence TGA-GCC-ATG-A is changed in 2 places to become TGA-GCA-CAT-GA.When one base is changed, it is called a point mutation.In this case, a GCC in the DNA has been changed to a GCA. This would mean the mRNA codon (coded for by this DNA) would change from CGG to CGU.Both of these codons code for the same amino acid - Arginine. Therefore this type of point mutation is known as a silent mutation.The extra C that appears would be called an addition mutation, which is a type of frameshift mutation.
What causes mangoes which are old to become pickles?
Mangoes become pickles by adding vinegar and spices in a specific sequence. Mangoes do not become pickles by being old. In fact, old mangoes should not be used in canning.
Where do alleles come from?
Alleles come from mutations in the DNA sequence of a gene. These mutations can be the result of errors during DNA replication, exposure to mutagenic agents, or genetic recombination. Once a mutation occurs, it can become a new allele that contributes to genetic diversity.
What can stars become?
Main-sequence.
Is Sickle-cell disease an example of an inherited mistake in the amino acid sequence?
Yes, sickle-cell disease is caused by a genetic mutation in the hemoglobin gene, resulting in an error in the amino acid sequence of the hemoglobin protein. This mistake leads to the production of abnormal hemoglobin that causes red blood cells to become sickle-shaped, leading to various health problems.
If a gene was changed by mutation then what do you think would happen to the shape of enzyme built by the gene?
There are many possibilities. If the mutations occurs but it does not change the amino acid sequence due to the redundancy (codon degeneracy) of the genetic code, then the mutation is silent and no effect is observed. If the mutation occurs and the amino acid sequence is changed, but the new amino acid has similar properties to the original amino acid (e.g. aspartic acid -> glutamic acid) and the position of the mutation is far away from the active site, then the mutation will likely have minimal effects on the structure and function of the protein. However, if the mutation changes the amino acid sequence such that the new amino acid has a very different property to the original (lysine -> valine) or if the mutation occured close to the acitive site, then it is very likely that the structure and function of the protein will be compromised. Lastly, there is also the marginal chance that the last type of mutation described above actually increases the effectiveness of the protein. Though this is exceedingly rare, it is the driving force behind evolution.
When does a fragile X premutation become a full mutation?
Once the size of the premutation exceeds 230 repeats, it becomes a full mutation and the FMR-1 gene is disabled. Individuals who carry the full mutation may have fragile X syndrome
