What choice is a difference between deoxyribonucleotides and ribonucleotides?

What is a similarity between the bacteriophage lytic cycle and transduction?

DNA replication from the origin of transfer goes in 1 direction.

Which choice best describes how the Ames test determines whether or not a test chemical is a mutagen? 

Which best describes lysogenic conversion?  

In the mutant sequence below, pick the choice that describes the mutation types at the DNA level and the protein level.  5′ UUU  CAU  AAG   UAC  AGC 3′  — Normal mRNA 5′ UUU  CAU  AAG   UAA  AGC 3′  — mRNA with mutation

Which choice is the complementary DNA sequence to 5’ GATTCG 3’ 

All LIVING organisms use which molecule(s) for their genetic (hereditary) material?

The technique for calculus removal with a curet involves all of the following except one, which is the exception? 

All of the following are therapeutic interventions for gingivitis except one. Which one is the exception?