Bio Tech - Virus

Louis Pasteur

Wendell Stanley

Edward Jenner

Alexander Fleming

Viruses can only exhibit life characteristics inside their host cells, while bacteria can do so independently.

Bacteria can only exhibit life characteristics inside their host cells, while viruses can do so independently.

Both viruses and bacteria can only exhibit life characteristics inside their host cells.

Neither viruses nor bacteria can exhibit life characteristics.

capsid

nucleocapsid

capsomere

peplomers

capsid

nucleocapsid

capsomere

peplomers

Proteins

Lipids

Glycoproteins

Capsomeres

capsid

nucleocapsid

capsomere

peplomers

Capsid

Envelope

Peplomers

Glycoproteins

Reverse transcriptase

DNA polymerase

RNA polymerase

Ligase

A capsid with a central cavity or hollow tube made by proteins

A structure that appears spherical and is made up of equilateral triangles

A polyhedron capsid attached to a helical tail

A structure surrounded by a lipid bilayer membrane

Helical viruses have a central cavity or hollow tube made by proteins.

Icosahedral viruses appear spherical and are made up of equilateral triangles.

Envelope viruses have only a helical structure.

Complex viruses have a polyhedron capsid attached to a helical tail.

zoophaginae

retroviridae

bacteriophage

phytopaginae

zoophaginae

retroviridae

bacteriophage

phytopaginae

Because bacteriophages only infect prokaryotic cells

Because similar processes are observed in eukaryotic viruses

Because bacteriophages do not cause cell death

Because bacteriophages are not viruses

Adsorption

Penetration

Translation

Maturation

Virulent phages integrate into the host genome and remain dormant

Temperate phages always cause immediate cell lysis

Virulent phages typically lead to cell death through lysis

Temperate phages cannot replicate with the cell genome

Viral DNA integrates into the host genome and remains dormant

The virus replicates and produces progeny phages

Symptoms of viral infection are present

The host cell survives and continues to divide

Viral DNA merges with cell DNA and does not destroy the cell.

The virus does not produce progeny.

There are symptoms of viral infection.

Temperate viral replication takes place.

The viral DNA integrates into the host DNA and may remain dormant.

The viral DNA immediately destroys the host cell.

The virus produces symptoms right away.

The virus cannot integrate with host DNA.

Lytic cycle destroys the host cell, lysogenic cycle does not.

Lysogenic cycle produces new viruses immediately.

Lytic cycle integrates viral DNA into host DNA.

Lysogenic cycle always causes symptoms.

Due to the origin of the virus and compatibility with host cell genes.

Because all viruses infect all cell types.

Because viruses are visible under a microscope.

Because viruses are always harmful to animals.

progeny

virion

prion

viroid

progeny

virion

prion

viroid

progeny

virion

prion

viroid

That TMV is a living organism

That TMV is a chemical rather than an organism

That TMV is composed of DNA and protein

That TMV can infect only animals

virulent

inactivated

attenuated

temperate