Which of the Following Statements Is CORRECT About Mutation

Multiple Choice

Which of the following statements is CORRECT about mutation?

A) Mutations caused by environmental factors are always repaired.
B) Mutations occurring during the replication process are always harmful.
C) Mutations only occur during DNA replication.
D) Mutations occurring during the replication process only affect the secondary structure of proteins.
E) Mutations are permanent changes in the base sequence of DNA.