Which of the following supports the argument that viruses are nonliving?

Their DNA does not encode proteins

Most new viral diseases arise as a result of

humans coming in contact with isolated habitats

How does a virus cause a person to develop the common cold?

invades the host cell to reproduce

removes energy from the host cell

produces toxins in the host cell

protects the host cell from bacteria

The host range of the virus is determined by ____.

the proteins on the surface and that of the host

whether or not its nucleic acid is DNA or RNA

the enzymes carried by the virus

the protein's in the hosts cytoplasm

Which of the following can be effective in preventing the onset of viral infection in humans?

taking drugs that inhibit transcription

What is the first step of the virus reproduction cycle?

A virus attaches to the surface of a host cell

The viruses genetic material (DNA) starts to take over the functions of the cell

The host cell bursts open , releasing the new viruses

The virus injects its genetic material into the cell

Which statement is true about viruses?

Viruses can reproduce only using a host cell.

Viruses can eat and metabolize food.

Viruses can reproduce on their own at any time.

Viruses contain DNA, so they are alive.

Which of the following is true for both bacteria and viruses?

can be killed using antibiotics

Which of these is characteristic of both viruses and bacteria?

They contain proteins and nucleic acids.

They get their energy from their environment.

They can reproduce on their own.

They can form crystals and become dormant.

The projections on the surface of this virus allow the virus to —

signal other viruses to infect a host cell

To treat genetic diseases, viruses are used to transport replacement genes to the problematic human tissue. What part of the life cycle of a virus would make them well adapted at the function of entering a cell’s nucleus and replacing genes?

Viruses contain the genetic code (DNA or RNA) which they are able to insert into a host cell’s genome.

In the lytic cycle, a virus will rapidly destroy the host cell.

Viruses do not have their own machinery to reproduce apart from the host.

Viruses have the ability to escape the human immune system

During an infection, some viruses remain inside cell but do not cause symptoms of disease. The graphic below depicts the...

lysogenic cycle and the viral nucleic acid inserts into the host cell chromosome

lytic cycle and the host cell is destroyed by rapidly reproducing viral particles

lytic cycle and the viral nucleic acid inserts into the host cell chromosome

lysogenic cycle and the viral nucleic acid replicates independently of the host cell chromosome

The HIV virus, which contain RNA instead of DNA, is classified as a retrovirus. Which of the following BEST describes how retroviruses work?

Their genetic material is copied backwards from RNA to DNA.

They prevent the host from creating RNA during protein synthesis.

They only infect cells in the tissues of the lungs.

Their genetic material is copied normally from DNA to RNA.

A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?

The virus damages immune cells while using their machinery to produce copies of itself.

The virus produces toxins that weaken immune cells and prevent them from reproducing.

The virus uses nutrients meant for immune cells to fuel its own cellular respiration.

The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally.

Emma visited her family doctor in November to receive a flu vaccination, as it has been a very harsh flu season. As the doctor escorted Emma to the checkout station, he reminded her that it is very important that she return next year to receive another flu shot. Why must Emma get a new flu vaccination every year?

Because the influenza virus mutates rapidly and this year’s vaccine will not be effective against next year’s flu.

Because her immunities will wear off.

Because the doctor wants to make more money by selling more vaccines.

Because the vaccine builds up in a person’s system. The more vaccines Emma receives the higher her immunity to the virus.

Reasons that viruses are considered to be nonliving is because

They cannot reproduce on their own

Viruses

Biology

6th - 8th Grade

36 Questions

NGSS covered

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What do viruses need to reproduce?

they need genetic material

They need a host cell

They need bacteria

They need insulin

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A virus can be classified by its type of

mitochondria

chromosomes

nucleic acid

carbohydrates

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A(n) _____ is a virus that enters a bacterial cell.

endospore

decomposer

plasmid

bacteriophage

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a virus invades a living cell, its _______
takes over the cell's functions.

outer coat

genetic material

core

cytoplasm

What part of a virus is the protein capsule that houses the genetic material (DNA/RNA)?

tail

nucleus

capsid

glycoprotein

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which viral life cycle kills its host cell by lysing?

lytic

mitosis

lysogenic

S phase

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which viral life cycle allows viral genetic material to lay dormant while the host cell reproduces?

lytic

mitosis

lysogenic

S phase

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Viruses

What do viruses need to reproduce?

A virus can be classified by its type of

A(n) _____ is a virus that enters a bacterial cell.

When a virus invades a living cell, its _______takes over the cell's functions.

What part of a virus is the protein capsule that houses the genetic material (DNA/RNA)?

Which viral life cycle kills its host cell by lysing?

Which viral life cycle allows viral genetic material to lay dormant while the host cell reproduces?

Which of the following supports the argument that viruses are nonliving?

Which of these is a plant virus?

Most new viral diseases arise as a result of

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When a virus invades a living cell, its _______
takes over the cell's functions.