Praxis 5005 Practice Question
If the nucleotide sequence of a section of DNA that codes for a protein is changed, which of the following has occurred?
Correct Answer: C
Rationale: When the nucleotide sequence of DNA is altered, it signifies a mutation, which can lead to changes in the protein produced.
- **A: Transcription** refers to the process of copying DNA into RNA, not a change in the DNA sequence itself.
- **B: A new adaptation** implies a beneficial change that enhances survival, which may result from mutations but is not the definition of a sequence change.
- **D: Natural selection** is the process by which certain traits become more common due to their advantages, rather than directly relating to changes in the DNA sequence.
Thus, the alteration in the nucleotide sequence is best described as a mutation.
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