Viruses Lesson

Multiple Choice

Viruses are not living, because they

• are not cellular.

• have no DNA.

• do not reproduce.

• lack a nucleus.

Multiple Choice

Cell theory states:

all living things are composed of one or more cells;

a cell is the smallest unit that still retains the properties of life;

and new cells only come from cells that already exist.

Based on cell theory, which of these answer choices would describe one reason a virus is considered nonliving?

• A virus is too small to be considered a cell.

• A virus does not contain genetic material.

• A virus does not have a nucleus.

• A virus cannot reproduce itself without a host

Multiple Choice

Viruses CANNOT

• be crystallized.

• live in bacteria.

• cause disease in plants.

• reproduce on their own.

Multiple Choice

The purpose of the protein coat surrounding a virus, other than to protect the virus, is to-

• react with the cell wall of the host cell

• release hereditary information into the host cell

• produce proteins within the host cell

• destroy the nucleus of the host cell

Multiple Choice

All viruses contain-

• nucleic acids

• ribosomes

• mitochondria

• cytoplasm

Multiple Choice

What part of the phage is the DNA?

• A

• B

• C

• D

Multiple Choice

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

• endospore

• decomposer

• plasmid

• bacteriophage

Multiple Choice

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

• tail

• nucleus

• capsid

• glycoprotein

Multiple Choice

What happens in the lysogenic cycle? 

• Virus goes in and leaves the host cell

• Virus quickly kills the host cell

• Virus inject the nucleic acid into the host cell, and the nucleic acid integrates into the host cell DNA, and stay dormant for a long time

• Bacteria injects DNA into a host cell

Multiple Choice

What process is this?

• phagocytosis

• lytic cycle

• lysogenic cycle

• formation of antibodies

Multiple Choice

What is shown here?

• Lysogenic Cycle

• Lytic Cycle

• Binary Fission

• Conjugation

Multiple Choice

The lysing of a cell occurs in which phase?

• 1

• 2

• 4

• 5

Multiple Choice

Host DNA is compromised and viral DNA takes over in which phase?

• 1

• 2

• 3

• 4

Multiple Choice

What is the 1st step of virus infection?

• Entry

• Attachment

• Replication

• Assembly

Multiple Choice

When a virus mutates this:

• Helps the virus adapt to a new host

• Can have no effect, be detrimental, or can be beneficial and help the virus adapt to its new host

• Causes an outbreak

• gives the virus super powers like shooting lasers out of it's eyes

Multiple Choice

Each of the following statements is true except -

• viruses infect living cells

• viruses can replicate without a host

• viruses can cause illness

• viruses come in different types

Multiple Choice

A virus infects a host in order to:

• Take Nutrients

• Make the host sick

• Make copies of itself

• Destroy the host cells

Multiple Choice

Identify the correct characteristic of life:

A lizard can change colors to blend in.

• Levels of Organization

• Adaptation

• Homeostasis

• Grows & Develops

Multiple Choice

Which characteristic of life describes a person touching a hot stove and jerking their hand back.

• Organization

• Maintaining Homeostasis

• Respond to a Stimuli

• Grows and Develops

Multiple Choice

Identify the correct characteristic of life: 

Fox chasing a rabbit—rabbit running away

• Energy

• Cells

• Responds to a Stimuli

• Maintains Homeostasis

Multiple Choice

Vaccines can be used to prevent viral infection by

• destroying any viruses that enter the host.

• creating a blocking protein on the cell.

• creating an immune response in the host.

• preventing replication of the virus.

Multiple Choice

Is this characteristic define as living organisms, viruses, or both:

Ability to reproduce independently.

• Living Organisms

• Viruses

• Both

Multiple Choice

Is this characteristic define as living organisms, viruses, or both:

Not made of cells.

• Living Organisms

• Viruses

• Both

Multiple Choice

Is this characteristic define as living organisms, viruses, or both:

Protein coat instead of membrane.

• Living Organisms

• Viruses

• Both

Multiple Choice

Is this characteristic define as living organisms, viruses, or both:

May mutate and evolve.

• Living Organisms

• Viruses

• Both

Multiple Choice

Is this characteristic define as living organisms, viruses, or both:

The ability to grow.

• Living Organisms

• Viruses

• Both

Multiple Choice

Examine the model of a viral structure shown here. Select the choice that accurately compares and contrasts the structures of viruses and cells.

• Viruses have the ability to maintain homeostasis.

• Both cells and viruses have DNA/RNA.