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Viruses in Biology Quiz

#1

Which of the following is NOT a characteristic of viruses?

Ability to reproduce outside a host cell
Explanation

Viruses require a host cell to replicate.

#2

Which of the following is a common method of viral transmission?

Inhalation of respiratory droplets
Explanation

Respiratory droplets are a common mode of virus transmission, especially for respiratory viruses like COVID-19.

#3

Which of the following is NOT a type of viral replication cycle?

Binary fission
Explanation

Binary fission is a method of bacterial replication, not viral replication.

#4

What is a prophage in the context of viral replication?

A viral genome integrated into the host cell's genome
Explanation

A prophage is a dormant viral genome integrated into the host DNA.

#5

Which of the following is NOT a feature of a bacteriophage?

Contains RNA as its genetic material
Explanation

Bacteriophages typically contain DNA, not RNA, as their genetic material.

#6

What is the function of viral spikes?

Facilitate attachment to host cells
Explanation

Viral spikes help viruses attach to specific receptors on host cells.

#7

Which of the following is NOT a method by which viruses can enter host cells?

Binary fission
Explanation

Binary fission is a method of cell division, not viral entry.

#8

What is the primary function of viral capsids?

Protect viral genetic material
Explanation

Capsids provide protection to the genetic material of viruses.

#9

Which enzyme is essential for HIV replication?

Reverse transcriptase
Explanation

Reverse transcriptase converts HIV RNA into DNA for integration into the host genome.

#10

Which of the following viruses is responsible for causing chickenpox?

Varicella-zoster virus
Explanation

Varicella-zoster virus causes chickenpox and shingles.

#11

What is a retrovirus?

A virus that can integrate its genetic material into the host genome
Explanation

Retroviruses, like HIV, use reverse transcription to integrate their RNA into host DNA.

#12

Which of the following viruses causes the common cold?

Rhinovirus
Explanation

Rhinoviruses are a common cause of the common cold.

#13

What is the function of a viral envelope?

Facilitates attachment to host cells
Explanation

Viral envelopes contain proteins that aid in host cell attachment and entry.

#14

Which of the following is characteristic of RNA viruses?

They can undergo rapid mutation
Explanation

RNA viruses have high mutation rates, contributing to their adaptability.

#15

What is a viroid?

An infectious agent composed solely of RNA
Explanation

Viroids are small, infectious RNA molecules lacking a protein coat.

#16

Which of the following is a strategy used by viruses to evade the host immune response?

Antigenic variation
Explanation

Antigenic variation involves changing surface proteins to evade immune detection.

#17

What is the name of the protein coat surrounding a virus's genetic material?

Capsid
Explanation

Capsids enclose the genetic material of viruses.

#18

Which of the following is an example of a retrovirus?

HIV
Explanation

HIV is a well-known retrovirus.

#19

Which of the following viruses is responsible for causing Ebola virus disease?

Ebola virus
Explanation

Ebola virus causes severe hemorrhagic fever in humans and other primates.

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