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Virus Structures and Sizes

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Questions and Answers

What is a defining characteristic of an icosahedral virus?

Contains an additional covering known as the envelope

Solid structure with many geometric sides

Consists of 20 triangular faces with 12 apexes (correct)

Infects and attacks bacteria

Which component defines the overall shape of the nucleocapsid in viruses?

Capsid

DNA or RNA

Spikes

Capsomers (correct)

What distinguishes an enveloped virus from a non-enveloped virus?

Possesses an additional covering called the envelope (correct)

Consists of capsomers

Contains DNA or RNA

Replicates its own DNA

What is a bacteriophage primarily known for?

Infecting and attacking bacteria (B) Signup and view all the answers

What is the replication process for double-stranded DNA viruses in a host cell?

Opening of a replication bubble for DNA replication (B) Signup and view all the answers

Which type of virus must direct the synthesis of its own DNA-dependent DNA polymerase?

DNA viruses (C) Signup and view all the answers

What is the role of spikes in enveloped viruses?

Proteins inserted into the envelope for attachment (D) Signup and view all the answers

What distinguishes a complex virus from a simple virus in terms of polymerase usage?

Complex viruses use host cell polymerase, while simple viruses use viral-coded polymerase. (D) Signup and view all the answers

What is the primary function of the capsid in a virus?

Protection of the genetic material inside (B) Signup and view all the answers