What do animal viruses contain?

Animal viruses contain only one kind of nucleic acid, either DNA or RNA. To replicate, animal viruses divert the host cell’s metabolism into synthesizing viral building blocks, which then self-assemble into new virus particles that are released into the environment.

What are the 6 classes of animal viruses?


  • Group I: double-stranded DNA viruses.
  • Group II: single-stranded DNA viruses.
  • Group III: double-stranded RNA viruses.
  • Group IV: positive sense single-stranded RNA viruses.
  • Group V: negative sense single-stranded RNA viruses.
  • Group VI: single-stranded RNA viruses with a DNA intermediate.

What 4 things are used to classify viruses?

Four characteristics were to be used for the classification of all viruses: Type of the nucleic acid including size of the genome, strandedness (single or double), linear or circular, positive or negative (sense), segments (number and size), sequence and G+C content etc.

What are some key variables used in the classification of animal viruses?

Four characteristics were to be used for the classification of all viruses:

  • Nature of the nucleic acid in the virion.
  • Symmetry of the protein shell.
  • Presence or absence of a lipid membrane.
  • Dimensions of the virion and capsid.

How many animal viruses are there?

Finally, this number was extrapolated to all 5,486 known mammals, yielding a total of at least 320,000 viruses.

What is animal virus example?

Examples include, rabies, yellow fever and pappataci fever. The viruses that infect other vertebrates are related to those of humans and most families of viruses that cause human diseases are represented. They are important pathogens of livestock and cause diseases such as foot-and-mouth disease and bluetongue.

What are the main classes of viruses?

Viruses are classified into four groups based on shape: filamentous, isometric (or icosahedral), enveloped, and head and tail. Many viruses attach to their host cells to facilitate penetration of the cell membrane, allowing their replication inside the cell.

What category is a virus?

Viruses are classified by phenotypic characteristics, such as morphology, nucleic acid type, mode of replication, host organisms, and the type of disease they cause.

What are the three main criteria used to classify viruses?

Viruses are classified on the basis of morphology, chemical composition, and mode of replication.

Which of the following methods is used to classify viruses?

What are some animal viruses?

What is the classification of a virus?

Viruses are categorized based upon their type of nucleic acid (DNA viruses in yellow boxes and RNA viruses in blue boxes) and further classified based upon distinguishing characteristics. Note the nucleic acid, size, and architectural differences between viruses of different families.

What is the structure of an animal virus?

Like other viruses, animal viruses are tiny packages of protein and nucleic acid. They have a protein shell, or capsid, and genetic material made of DNA or RNA that’s tucked inside the caspid. They may also feature an envelope, a sphere of membrane made of lipid.

What is the chemical composition of a virus?

Chemical Composition and Mode of Replication:The genome of a virus may consist of DNA or RNA, which may be single stranded (ss) or double stranded (ds), linear or circular. The entire genome may occupy either one nucleic acid molecule (monopartite genome) or several nucleic acid segments (multipartite

What is the life cycle of an animal virus?

Animal viruses, like other viruses, depend on host cells to complete their life cycle. In order to reproduce, a virus must infect a host cell and reprogram it to make more virus particles. The first key step in infection is recognition: an animal virus has special surface molecules that let it bind to receptors on the host cell membrane.