Virus Basics Quiz

Can a virus be killed by an antibiotic?

• yes

• no

Which of the following best describes the lysogenic cycle of a virus?

• The virus immediately destroys the host cell.

• The viral DNA is integrated into the host cell's DNA and replicates along with it.

• The virus replicates rapidly and causes the host cell to burst.

• The virus attaches to the host cell but does not inject its DNA.

During which cycle do viruses typically cause the destruction of the host cell?

• Lysogenic cycle

• Lytic cycle

• Both lysogenic and lytic cycles

• Neither lysogenic nor lytic cycles

What is a bacteriophage?

• A virus in the lytic phase

• A virus that infects bacteria

• A stage in the virus life cycle where it is dormant outside the host cell

Which of the following triggers the lytic cycle in a virus that is in the lysogenic cycle?

• The host cell dividing

• The presence of other viruses

• Environmental stress or certain chemicals

• Absorption of sunlight

How does the lysogenic cycle benefit a virus?

• It allows the virus to replicate without destroying the host cell.

• It causes immediate destruction of multiple host cells.

• It prevents the virus from infecting a host

• A and C

Which statement is true about the lytic cycle?

• The virus integrates its DNA into the host's DNA and can remain dormant.

• The virus's DNA is replicated, transcribed, and translated immediately after entering the host cell.

• The host cell is not harmed in the lytic cycle.

• The lytic cycle is a slow process compared to the lysogenic cycle.

How does the lytic cycle differ from the lysogenic cycle in terms of viral replication?

• In the lytic cycle, the virus immediately replicates and destroys the host cell, while in the lysogenic cycle, the viral DNA may integrate into the host genome and replicate along with it.

• The lysogenic cycle leads to the immediate destruction of the host cell, while the lytic cycle does not.

• There is no difference; both cycles result in the immediate replication and destruction of the host cell.

What is the basic structure of a virus?

• A cellular membrane surrounding cytoplasm and a nucleus

• A protein coat called a capsid surrounding nucleic acid

• A rigid cell wall containing cellulose

• A lipid bilayer with embedded proteins but no nucleic acid

What is a characteristic feature of viruses that distinguishes them from living cells?

• Viruses can perform photosynthesis.

• Viruses have a complex cellular structure.

• Viruses require a host cell to replicate.

• Viruses are capable of independent metabolism.