Which statements describe gene therapy? Check all that apply. It cures all cases of cystic fibrosis.It involves the modification of DNA.It is easy to apply to all cells affected by the disorder.It attempts to replace a mutated gene with normal DNA.It does not always cure patients who use it.

Gene therapy involves changing genetic material, so it involves DNA modification. One approach attempts to replace or correct a mutated gene using normal DNA. It is not easy to reach every affected cell, and it does not always cure the condition; therefore, the statements that it cures all cases of cystic fibrosis and is easy to apply to all affected cells are not accurate.

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