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Characteristics of Viruses Quiz

#1

Which of the following is true about viruses?

They require a host to reproduce
Explanation

Viruses cannot replicate on their own and need a host organism.

#2

What is the genetic material of a virus?

Either DNA or RNA
Explanation

Viruses can have either DNA or RNA as their genetic material.

#3

What is a bacteriophage?

A virus that infects bacteria
Explanation

Bacteriophages are viruses that infect and replicate within bacteria.

#4

Which of the following is a viral disease in humans?

Hepatitis B
Explanation

Hepatitis B is a viral infection affecting the liver.

#5

What is the shape of a typical virus particle?

Spherical
Explanation

Many viruses have a spherical shape, although they can vary.

#6

Which of the following is NOT a characteristic of viruses?

They can infect all types of organisms
Explanation

Viruses have specific hosts and cannot infect all organisms.

#7

What is the typical size range of viruses?

100-1000 nanometers
Explanation

Viruses are extremely small, typically ranging from 100 to 1000 nanometers.

#8

Which of the following is the correct definition of a virion?

A virus particle outside of a host cell
Explanation

A virion is a complete virus particle capable of infecting a host.

#9

Which of the following is NOT a method of viral transmission?

Photosynthesis
Explanation

Viruses cannot transmit through photosynthesis as they are not capable of it.

#10

Which of the following is the primary function of a viral envelope?

To aid in the attachment of the virus to host cells
Explanation

The viral envelope helps viruses attach to and enter host cells.

#11

Which viral structure is responsible for attaching to host cells?

Spike proteins
Explanation

Spike proteins on the virus's surface facilitate attachment to host cells.

#12

What is meant by the term 'viral latency'?

The ability of a virus to remain dormant in a host cell without causing symptoms
Explanation

Viral latency refers to the period during which a virus remains dormant in a host without causing symptoms.

#13

What is a prion?

An infectious protein
Explanation

Prions are misfolded proteins that can cause other proteins to misfold, leading to disease.

#14

What is meant by the term 'viral tropism'?

The specific cells or tissues that a virus infects
Explanation

Viral tropism refers to the preference of a virus for certain cells or tissues in an organism.

#15

Which of the following is a characteristic feature of a viroid?

It lacks a protein coat
Explanation

Viroids are small, single-stranded RNA molecules that lack a protein coat.

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