In his 1928 experiments, F. Griffith studied two strains of Streptococcus pneumoniae that differed in colony morphology and biological activity. Which combination correctly describes these two strains?

An organism with genotype Aa is:

Why were Avery, MacLeod, and McCarty’s results initially met with skepticism by some scientists?

Which tool visualizes allele segregation?

Which molecule stores genetic information?

In the Hershey–Chase experiment, radioactive phosphorus (³²P) was used to label which component of the bacteriophage?

DNA polymerase synthesizes DNA in which direction?

Which enzyme synthesizes RNA primers during replication?

Why were bacteriophages used as a model system to test whether DNA or protein is the genetic material?

What key result from Griffith’s experiment provided evidence for the process later termed transformation?