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Viruses and Life: An Overview

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Questions and Answers

What is the primary function of spike proteins on the SARS-CoV-2 virus?

They help the virus replicate within host cells.

They assist the virus in attaching to and entering cells. (correct)

They are responsible for causing symptoms in infected individuals.

They provide protection from the immune system.

Which virus is specifically mentioned as having caused an estimated one million deaths between 1968 and 1969?

Influenza A

SARS-CoV-2

H3N2 (correct)

Covid-19

What distinguishes SARS-CoV-2 from other common viruses like flu and cold viruses?

It primarily infects plant cells.

It emerged in 2019 and is associated with Covid-19. (correct)

It has been completely eradicated.

It has no symptoms associated with infection.

Which of the following statements accurately describes the response to viral infections?

<p>Most people recover without any treatment. (D)</p> Signup and view all the answers

Why is there a debate among scientists about classifying viruses as living organisms?

<p>Viruses do not exhibit characteristics of life without a host. (A)</p> Signup and view all the answers

Study Notes

Viruses and Life

Viruses are infectious agents
Some scientists consider viruses living organisms while others do not
Viruses cause illness such as influenza (flu), Covid-19 (SARS-CoV-2)
A new virus emerged in 2019 called SARS-CoV-2
This virus has symptoms ranging from mild to deadly
Scientists study to find effective treatment and prevention methods such as vaccines and drugs
Viruses infect specific cells (animal or plant)
In 1968-1969 H3N2 influenza killed about 1 million
There are thousands of different types of viruses
Viruses are very small, about 100,000 times smaller than cells
Viruses attach to cell surfaces to infect and replicate.

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Description

Explore the fascinating world of viruses and their impact on life. This quiz covers what viruses are, their classification as living organisms, and their role in causing illnesses like influenza and Covid-19. Get ready to test your knowledge on their structure, infection methods, and ongoing scientific research for treatment and prevention.