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How does a transversion mutation result in a purine being replaced by a pyrimidine or vice versa?
A transversion mutation is a type of genetic change where a purine (adenine or guanine) is replaced by a pyrimidine (cytosine or thymine) or vice versa. This mutation occurs when a single nucleotide base in the DNA sequence is substituted with a different type of base. This change can lead to alterations in the genetic code and potentially impact the function of the gene.
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What is transversion mutation?
A transversion mutation is a type of point mutation where a purine base is substituted for a pyrimidine, or vice versa. This type of mutation results in a change in the base pair from a double-ring structure to a single-ring structure, potentially causing changes in the amino acid sequence during protein synthesis.
When DNA replication occurs before meiosis the original DNA strand cag ccg tag is copied into complementary strand gtc aca ggc atc what type of mutation has occurred?
A point mutation has occurred in this case, specifically a transition mutation where one purine (adenine or guanine) is replaced by another purine, or one pyrimidine (thymine or cytosine) is replaced by another pyrimidine. In this example, the cytosine (C) in the original strand has been replaced by a guanine (G) in the complementary strand.
What are a purine and a pyrimidine that are capable of hydrogen bonding to form the rung structure of DNA called?
Adenine (purine) can hydrogen bond with thymine (pyrimidine), and guanine (purine) can hydrogen bond with cytosine (pyrimidine) to form the rungs of the DNA double helix structure.
Purine nucleotides mainly differ from pyrimidine nucleotides in their number of?
Purine nucleotides differ from pyrimidine nucleotides in their structure due to the number of nitrogen-containing rings they have. Purine nucleotides have a double-ring structure, while pyrimidine nucleotides have a single-ring structure.
Is thymine and guanine both pryimidine bases?
No, thymine is a pyrimidine base while guanine is a purine base. Pyrimidine bases include cytosine, thymine, and uracil, while purine bases include adenine and guanine.
What is transversion mutation?
A transversion mutation is a type of point mutation where a purine base is substituted for a pyrimidine, or vice versa. This type of mutation results in a change in the base pair from a double-ring structure to a single-ring structure, potentially causing changes in the amino acid sequence during protein synthesis.
Does the last nucleotide in a codon have less specificity than the others and if so why?
Yes, this is true (generally speaking). In many cases there are two different codons that differ at the third position yet code the same amino acid. I hypothesize that the reason that this is so is that nature has naturally selected the codons to be resistant to certain transition and transversion mutations. transition mutation = purine to purine or pyrimidine to pyrimidine transversion mutation = purine to pyrimidine or pyrimidine to purine
What are the three common base-pair substitutions?
The three common base-pair substitutions are: Transition: a purine is replaced with another purine or a pyrimidine is replaced with another pyrimidine. Transversion: a purine is replaced with a pyrimidine or vice versa. Silent mutation: a base-pair substitution that does not result in a change to the amino acid sequence due to the degeneracy of the genetic code.
Is transversion of t to an equivalent to transversion of t to g For example is T961a the equivalent of T961g?
Transversion is the substitution of a purine for a pyrimidine and vice versa. The nitrogen bases adenine (A) and guanine (G) are purines and the nitrogen bases thymine (T) and cytosine (C) are pyrimidines. The transversion of T to A is equivalent to the transversion of T to G in that a pyrimidine, T, is substituted by either the purine A or the purine G. T961a is not equivalent to T961g.
When DNA replication occurs before meiosis the original DNA strand cag ccg tag is copied into complementary strand gtc aca ggc atc what type of mutation has occurred?
A point mutation has occurred in this case, specifically a transition mutation where one purine (adenine or guanine) is replaced by another purine, or one pyrimidine (thymine or cytosine) is replaced by another pyrimidine. In this example, the cytosine (C) in the original strand has been replaced by a guanine (G) in the complementary strand.
What is mutation and how many types of mutaion are there?
A mutation is any change in the DNA sequence. This list probably isn't exhaustive, but the types I can think of are: point (one basepair is changed into another) deletion (one or more basepairs is removed) insertion (one or more basepairs is added to the DNA sequence) translocation (a segment of DNA is moved from one region to another) duplication (a region of DNA is... well duplicated... some regions of DNA, particularly repetitive regions are often subject to extensive expansion) If you want to get really technical there are lots of subtypes and terminology used to describe mutations. A point mutation could also be termed a lot of other things, particularly if it is in a stretch of coding DNA (silent, missense, and nonsense mutations) and can be further subdivided by whether it's a change between a purine and a purine (transition mutation), a pyrimidine and pyrimidine (also a transition mutation), or a purine and a pyrimidine (transversion mutation).
How are four bases paired in a molecule DNA?
Adenine(purine)=========thymine(pyrimidine)Guanine(purine)----------------cytosine(pyrimidine)
Is nitrogen a base?
A basic compound that contains nitrogen, such as a purine or pyrimidine. A basic compound that contains nitrogen, such as a purine or pyrimidine.
When purine base only pairs with a pyrimidine?
This is a basic principle of DNA base pairing called Chargaff's rule. Adenine (purine) pairs with thymine (pyrimidine), while guanine (purine) pairs with cytosine (pyrimidine). This complementary base pairing is essential for the double-stranded structure of DNA.
What are a purine and a pyrimidine that are capable of hydrogen bonding to form the rung structure of DNA called?
Adenine (purine) can hydrogen bond with thymine (pyrimidine), and guanine (purine) can hydrogen bond with cytosine (pyrimidine) to form the rungs of the DNA double helix structure.
Where a purine base only pairs with a pyrimidine?
nitrogen
How do you recognize a purine?
By the fused imidazole and pyrimidine rings.
