試題詳解

10. Alfred Hershey and Martha Chase used radioactive phosphorus to trace the DNA of T2 phage in infected bacterial cells in their experiment. They finally demonstrated that _____.
(A) DNA replication is semiconservative
(B) genetic material is DNA
(C) DNA is a double helix
(D) there is a replication fork during cell division
(E) DNA is in the linear form