#1
Which of the following is NOT a mode of viral transmission?
Chemical transmission
ExplanationChemical transmission is not a recognized mode of viral transmission; common modes include airborne, droplet, and contact.
#2
Which organ is primarily affected by respiratory viruses?
Lungs
ExplanationRespiratory viruses primarily target the lungs, causing infections such as pneumonia and bronchitis.
#3
Which of the following is NOT a factor influencing viral transmission?
Race
ExplanationRace is not a factor influencing viral transmission; factors include environment, host immunity, and viral characteristics.
#4
Which of the following is a common symptom of viral respiratory infections?
Cough
ExplanationCough is a common symptom of viral respiratory infections, often accompanying conditions like the flu or the common cold.
#5
Which of the following viruses is responsible for causing the common cold?
Rhinovirus
ExplanationRhinovirus is a common cause of the common cold, leading to mild respiratory symptoms in infected individuals.
#6
What is the term used to describe the ability of a virus to cause disease?
Pathogenicity
ExplanationPathogenicity refers to the capability of a virus to induce disease in a host organism.
#7
Which of the following viruses is responsible for causing COVID-19?
Coronavirus
ExplanationCOVID-19 is caused by the coronavirus, specifically the SARS-CoV-2 virus.
#8
Which of the following is a viral disease that primarily affects the nervous system?
Polio
ExplanationPolio is a viral disease known for primarily affecting the nervous system, leading to paralysis.
#9
What is the primary mode of transmission for the Ebola virus?
Contact with bodily fluids
ExplanationEbola primarily spreads through direct contact with the bodily fluids of infected individuals.
#10
What is the term used to describe a virus that infects bacteria?
Bacteriophage
ExplanationA virus that infects bacteria is called a bacteriophage, targeting and infecting bacterial cells.
#11
What is the process by which a virus enters a host cell called?
Infection
ExplanationInfection is the entry and establishment of a virus within a host cell, initiating the replication process.
#12
Which of the following is an example of a retrovirus?
HIV
ExplanationHIV is a well-known example of a retrovirus, characterized by the reverse transcription of its RNA genome into DNA.
#13
What is the name of the protein on the surface of the influenza virus that determines its subtype?
Hemagglutinin
ExplanationHemagglutinin is the surface protein on influenza viruses that plays a key role in subtype determination.
#14
Which type of influenza virus can infect both birds and humans?
Type A
ExplanationInfluenza Type A is capable of infecting both birds and humans, contributing to the emergence of pandemics.
#15
Which of the following viruses is associated with causing cervical cancer?
Human papillomavirus (HPV)
ExplanationHPV is linked to cervical cancer, emphasizing the importance of HPV vaccination for prevention.