Question

Animal viruses may be enveloped or non-enveloped. What steps does having the envelope change and how does it change them?

Answer 1

enveloped.

Classifying animal viruses

Animal viruses come in many types, and they enter, commandeer, and exit cells in a variety of different ways. How can we organize this mess of viruses in a way that's consistent and makes sense?

The Baltimore system groups viruses according to their type of genetic material and how it's used to make messenger RNAs (mRNAs), key intermediates in the production of viral proteins and the assembly of new viruses. A virus's Baltimore group depends on:

• The molecule it uses as genetic material (DNA or RNA)
• Whether the genetic material is single- or double-stranded
• The steps the virus uses to make an mRNA

The Baltimore system divides viruses into seven groups. You can see the basic features of each group, including its genetic material and the pathway it uses to make an mRNA,