# ch. 6 quiz

5.0 (2 reviews)
Frederick Griffith conducted experiments where nonlethal bacterial acquired the ability to cause lethal pneumonia due to the presence of an unknown chemical. This chemical was later found to be
A) RNA.
B) a protein.
C) DNA.
D) nonhereditary material.
E) phosphorus.
Click the card to flip 👆
1 / 22
Terms in this set (22)
Hershey and Chase performed an experiment in which they used radioactive isotopes of phosphorus and sulfur to label different components of bacterial viruses. Their results clearly showed that
A) DNA was entering into the infected bacteria.
B) the viruses did not contain protein.
C) the viruses did not contain DNA.
D) protein was entering into the infected bacteria.
E) genetic material normally contains radioactive isotopes.
The most important experimental result that suggested to Watson and Crick that DNA was in the form of a helix was
A) the findings of Chargaff that DNA always had equal amounts of A and T and equal amounts of G and C.
B) Griffith's results with transformation.
C) the discovery that DNA is wound around histone proteins.
D) X-ray data from Rosalind Franklin.
E) understanding DNA replication.
The two strands of DNA in a DNA double helix
A) are identical to each other.
B) are connected to each other by covalent chemical bonds.
C) both contain nucleotides, but the order of the nucleotides on the two strands is not related.
D) are oriented in the same direction.
E) are antiparallel to each other.