What is meant by semi-conservative replication? Question 4 options: This means that each new molecule of RNA contains two strands of the original parent RNA and two strands of new, complementary RNA. Each new RNA molecule thus contains a whole of the original molecule. This means that each new molecule of RNA contains one strand of the original parent RNA and one strand of new, complementary RNA. Each new RNA molecule thus contains half of the original molecule. This means that each new molecule of DNA contains two strands of the original parent DNA and two strands of new, complementary DNA. Each new DNA molecule thus contains a whole of the original molecule. This means that each new molecule of DNA contains one strand of the original parent DNA and one strand of new, complementary DNA. Each new DNA molecule thus contains half of the original molecule.