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Medical Microbiology: Virus Lecture 1

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Questions and Answers

What is the basis of classification of viruses according to the text?

Physiochemical and antigenic properties

Virus protein properties and antigenic properties

Virus morphology and genome properties (correct)

Virus morphology and physiochemical properties

What is the Latin word for 'poison'?

Virus (correct)

Microscopic

Protozoa

Fungi

Which general characteristic is NOT included in the classification of viruses according to the text?

Presence of specific enzymes

Size and shape (correct)

Susceptibility to chemical and physical agents especially ether

pH stability

What are the relative sizes of microorganisms as compared to the unaided human eye?

40 μm Signup and view all the answers

What is the size range of viruses according to the provided information?

0.02-0.3 μm (30-300 nm) Signup and view all the answers

What is the geometric symmetry of a virus that produces a hollow near spherical structure with 20 identical triangular faces?

Cubic or icosahedral symmetry Signup and view all the answers

Which method of virus transmission involves direct transfer from other infected hosts through sexual contact?

By sexual contact Signup and view all the answers

During which step of viral replication does the virus attach to the cell surface by recognizing specific receptors?

Attachment/Adsorption Signup and view all the answers

How are non-envelope viruses engulfed into vacuoles during virus entry (penetration)?

Endocytosis Signup and view all the answers

In which process of viral release does budding of enveloped viruses occur through the host cell membrane?

Budding Signup and view all the answers