Which of the following is true of the sequences found in DNA libraries from human tissues?
◦ Those in a muscle genomic library should not be found within a brain genomic library.
◦ Those in a brain cDNA library should not be found within a muscle genomic library.
◦ Those in a muscle cDNA library should all be present in a brain genomic library.
◦ Those in a brain cDNA library should all be present a muscle cDNA library.
◦ Those in a muscle cDNA library should all be present in a brain cDNA library.