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Microbiology Study: Stains and Prokaryote Features

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Microbiology Study: Stains and Prokaryote Features

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Questions and Answers

What is the main reason that viruses are considered non-living?

They have a helical capsid structure

They reproduce through division

They require a host to replicate (correct)

They synthesize proteins

Which type of capsid structure consists of hollow tubes with protein walls?

Complex symmetry capsids

Enveloped capsids

Icosahedral capsid

Helical capsid (correct)

What kind of viruses use receptor-mediated endocytosis to enter host cells?

Icosahedral viruses

Complex symmetry viruses

Non-enveloped viruses

Enveloped viruses (correct)

Which virus is an example of a virophage that infects viruses?

Sputnik Signup and view all the answers

What is the function of viral spike proteins in enveloped viruses?

Fusing membranes to enter host cells Signup and view all the answers

What is the role of a replication factory in virus assembly?

To avoid immune defenses during assembly Signup and view all the answers

Which type of virus is characterized by a regular polyhedron with 20 faces and 12 vertices?

Icosahedral capsid viruses Signup and view all the answers

What distinguishes satellites from typical viruses?

Satellites lack genes for replication functions. Signup and view all the answers

What is the primary function of neuraminidase enzymes found on enveloped viruses?

Breaking down protective structures in infected cells Signup and view all the answers

What distinguishes enveloped viruses from non-enveloped ones in terms of entry into host cells?

Enveloped viruses fuse membranes while non-enveloped use receptor-mediated endocytosis. Signup and view all the answers