What is the function of dideoxyribonucleotides in sequencing DNA?
(1) They are used to initiate replication
(2) They bind to DNA polymerase and modify its behavior so it can replicate cloned DNA
(3) Their incorporation leads to termination of synthesis
(4) Incorporation of dideoxyribonucleotides prevents the degradation of DNA during electrophoresis
(5) Dideoxyribonucleotides have no roles in sequencing DNA