Final answer:
Answer choice 5) Thymine changed into cytosine is an example of a transversion mutation.Adenine changed into cytosine is an example of a transversion mutation because it involves the replacement of a purine with a pyrimidine.
Step-by-step explanation:
A transversion mutation occurs when a purine is replaced by a pyrimidine or vice versa. Out of the options given, answer choice 5) Thymine changed into cytosine is an example of a transversion mutation. In this case, a pyrimidine (thymine) is being replaced by a purine (cytosine), which is a different kind of nitrogenous base. This type of mutation can alter the function of the protein.
Adenine changed into cytosine is an example of a transversion mutation because it involves the replacement of a purine with a pyrimidine.
An example of a transversion mutation is when a purine base is replaced by a pyrimidine base, or vice versa. Considering the options provided, Adenine changed into cytosine is an example of transversion because adenine (a purine) is replaced by cytosine (a pyrimidine). Other options either involve transitions (purine to purine or pyrimidine to pyrimidine) or in the case of uracil and thymine, involve RNA rather than DNA.