RNA molecules can have catalytic functions as well. A well known example would be:
1. Polynucleotide kinase.
2. Base pair recognition.
3. Methyl transferase.
4. Peptidyl transferase.

Semiconservative replication of DNA was first demonstrated in:

1. Drosophila melanogaster

2. Escherichia coli

3. Streptococcus pneumoniae

4. Salmonella typhimurium