#1
Which of the following is a common symptom of a viral infection?
High blood pressure
Fever
Bone growth
Increased appetite
#2
Which of the following diseases is caused by a coronavirus?
Ebola
Zika
COVID-19
Yellow fever
#3
Which organ is primarily affected by the Hepatitis B virus?
#4
What is the primary function of antiviral drugs?
To relieve symptoms
To kill the virus directly
To prevent viral replication
To strengthen the cell walls
#5
How do vaccines prevent viral infections?
By killing viruses in the environment
By stimulating the immune system to recognize and fight viruses
By directly attacking viruses in the body
By preventing the transmission of viruses
#6
What distinguishes a pandemic from an epidemic?
A pandemic is a disease outbreak that is limited to one country
An epidemic is a disease outbreak that affects many people globally
A pandemic is a global disease outbreak
An epidemic is caused only by bacteria, while a pandemic is caused by viruses
#7
Which virus is responsible for the common cold?
Influenza virus
Rhinovirus
Coronavirus
Adenovirus
#8
What is the primary method by which the rabies virus is transmitted to humans?
Ingesting contaminated water
Inhaling viral particles in the air
Bite from an infected animal
Touching a surface contaminated with the virus
#9
Which of the following is NOT a mechanism by which vaccines confer immunity?
Introducing a weakened form of the virus
Introducing a killed form of the virus
Introducing a toxin produced by the virus
Introducing antibiotics to target the virus
#10
What is the primary mode of transmission for the influenza virus?
Contaminated food
Insect bites
Airborne droplets
Direct sunlight exposure
#11
Which virus is responsible for causing chickenpox?
Human Immunodeficiency Virus (HIV)
Herpes Zoster Virus
Varicella-Zoster Virus
Human Papillomavirus (HPV)
#12
How does the Hepatitis C virus primarily spread?
Through contaminated water
By airborne transmission
Through blood-to-blood contact
Through direct skin contact
#13
What is the term for the outer protein coat of a virus?
Capsid
Envelope
Membrane
Cell wall
#14
What type of viral genome is found in the influenza virus?
Single-stranded DNA
Double-stranded DNA
Single-stranded RNA
Double-stranded RNA
#15
What is a distinguishing feature of viruses that differentiates them from bacteria?
Viruses can replicate without a host
Viruses contain both DNA and RNA
Viruses are considered living organisms
Viruses require a host cell to replicate
#16
Which of the following viruses is known to cause severe acute respiratory syndrome (SARS)?
Adenovirus
SARS-CoV
Rhinovirus
Hantavirus
#17
Which of the following is a characteristic of viral infections that distinguishes them from bacterial infections?
High fever is more common in viral infections
Antibiotics are effective against viral infections
Viral infections often resolve without treatment
Viral infections always cause visible symptoms
#18
What viral enzyme is targeted by antiretroviral therapy in the treatment of HIV?
DNA polymerase
Reverse transcriptase
RNA polymerase
Protease
#19
Which virus causes mononucleosis, also known as 'mono' or the 'kissing disease'?
Epstein-Barr Virus (EBV)
Cytomegalovirus (CMV)
Human Herpesvirus 6 (HHV-6)
Varicella Zoster Virus (VZV)
#20
What role do bats play in the transmission of viruses to humans?
Bats are immune to all viruses, preventing transmission to humans
Bats directly infect humans through contact
Bats act as reservoirs for many viruses that can spill over to humans
Bats consume infected insects, breaking the chain of transmission to humans
#21
Which of the following best describes the term 'zoonosis'?
A disease that primarily affects zoo animals
A viral infection that is transmitted from animals to humans
A disease caused by pathogens that thrive in high humidity
A condition where humans transmit diseases to animals
#22
What is the main characteristic of a lytic viral infection?
The virus integrates its DNA into the host's genome and lies dormant
The virus causes the host cell to produce viral particles until the cell lyses
The virus mutates rapidly, avoiding detection by the immune system
The virus replicates without causing harm to the host cell
#23
What mechanism do retroviruses, such as HIV, use to replicate?
Transcription of DNA from an RNA template
Reverse transcription of DNA from an RNA template
Direct replication of RNA from an RNA template
Translation of RNA into proteins without replication
#24
What is 'viral shedding' in the context of viral infections?
The process of eliminating the virus from the body
The breakdown of viral particles within the host
The release of virus particles from a host to the environment
The replication of viral particles within a host cell
#25
What is a viroid?
A type of virus that infects bacteria
A small infectious particle composed of RNA without a protein coat
A virus that only infects plants
A virus-like particle that lacks nucleic acid