UV light does not just create repairable dimers in DNA bases, it can and does rip DNA apart. Enough exposure would cause more than enough irreparable damage to kill the cell and 99% of the cell being destroyed is certainly not salvageable.
Regional service for the airline is served by Delta Connection. Delta typically charges a fee for all checked bags on domestic flights, with most international flights having an allowance of one or two free checked bags per passenger, depending on destination.
Delta will no longer accept pets as checked baggage, but will continue to transport allowable pets in all cabins of service except Delta One, effective March 1, 2016. Customers may also ship pets for travel within the United States as freight through Delta Cargo.