Biology CLEP Prep Practice Exam

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Prepare for the Biology CLEP Test with comprehensive flashcards and multiple choice questions. Each question comes with explanations and hints to ensure a full understanding. Boost your exam readiness today!

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What type of mutation occurs when a base pair is replaced with another?

Gene rearrangement
Deletion
Point mutation
Inversion

The correct answer is: Point mutation

A gene rearrangement involves changes in the order or structure of genes within the genome, rather than substitutions of individual base pairs. A deletion occurs when a segment of DNA is lost or removed, rather than just a single base pair substitution. An inversion involves a reversal of the order of a segment of DNA, rather than just a single base pair substitution. The correct answer is C because a point mutation refers specifically to a single base pair substitution, where one nucleotide is replaced with another. This type of mutation can result in a change in the genetic code of an organism, potentially altering the function of a protein or gene.