Are Viruses Alive? Basic Structure of Viruses

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What is the main reason viruses are not considered alive?

They lack cellular structure and metabolism.

Which of the following is NOT a component of a typical virus?

Cellular structure

What is the function of a viral envelope?

To aid in the virus's ability to infect host cells

What differentiates RNA viruses from DNA viruses?

<p>The type of genetic material they carry</p> Signup and view all the answers

What is the basic structure of a virus?

<p>Genetic material and a protein coat (capsid)</p> Signup and view all the answers

Which statement best describes a bacteriophage?

<p>A virus that infects and replicates within bacteria</p> Signup and view all the answers

Why are viruses considered obligate intracellular parasites?

<p>They rely on the machinery of host cells to replicate</p> Signup and view all the answers

What is the host range of a virus?

<p>The spectrum of host cells a virus can infect</p> Signup and view all the answers

Why must RNA viruses deliver special enzymes for cells to copy the viral genome?

<p>Because host cells lack enzymes to copy RNA directly</p> Signup and view all the answers

How do vaccines work against viruses?

<p>By stimulating the immune system to provide immunity</p> Signup and view all the answers

What is a zoonotic disease?

<p>A disease that can be transmitted from animals to humans</p> Signup and view all the answers

Why are antibiotics ineffective against viruses?

<p>Viruses lack cell walls targeted by antibiotics</p> Signup and view all the answers

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