Because viruses could not be visualized using conventional microscopes further progress required the development of techniques for isolating,propagating and analyzing viruses.All of the following are true except:
A)crystal structure of the tobacco mosaic virus showed that it was made up of RNA and protein
B)viruses were first observed with an electron microscope
C)viral DNA has a different structure from that discovered by Watson and Crick
D)Hershey and Chase demonstrated that the genetic material of some viruses is DNA

Question

Quizplus · Accepted Answer

Viral DNA has the same structure as the DNA discovered by Watson and Crick, consisting of a double helix made up of nucleotides. Option A is true, as the crystal structure of the tobacco mosaic virus was determined to be made up of RNA and protein. Option B is true, as viruses were first observed with an electron microscope in the 1930s. Option D is true, as Hershey and Chase conducted experiments in 1952 to demonstrate that the genetic material of some viruses was DNA.

Because Viruses Could Not Be Visualized Using Conventional Microscopes Further