Q: Which of the following equations best represents the burst size in a lytic bacteriophage infection?

$$\text{Burst size} = \frac{\text{Number of phage particles released}}{\text{Number of infected bacterial cells}}$$

Question 1

Which of the following best describes a prion?

Accepted Answer

A misfolded protein that can induce abnormal folding of normal proteins in the brain

Question 2

Which of the following statements about the lytic and lysogenic cycles of bacteriophages is correct?

Accepted Answer

In the lysogenic cycle, the viral genome integrates into the host genome and can remain dormant for generations

Question 3

A patient presents with jaundice and is diagnosed with hepatitis. Which of the following viruses is most likely to be transmitted via the fecal-oral route?

Accepted Answer

Hepatitis A virus

Question 4

Which of the following is a property of naked viruses?

Accepted Answer

They are generally more resistant to environmental conditions such as drying and detergents

Question 5

Which DNA virus family is associated with the development of smallpox?

Accepted Answer

Poxviridae

Question 6

A child develops hand, foot, and mouth disease. Which group of viruses is most commonly responsible for this illness?

Accepted Answer

Enteroviruses

Question 7

Which of the following best describes the structure of a typical bacteriophage?

Accepted Answer

A head containing nucleic acid, a tail sheath, and tail fibers

Question 8

Which of the following viruses is classified as a retrovirus and is known for causing immunosuppression?

Accepted Answer

Human Immunodeficiency Virus (HIV)

Question 9

Which of the following is a key difference between enveloped and naked viruses in terms of their mode of transmission?

Accepted Answer

Enveloped viruses are generally transmitted via close contact or bodily fluids, while naked viruses can survive longer in the environment and are often transmitted via the fecal-oral route

Question 10

A laboratory test detects the presence of double-stranded DNA in a viral sample from a patient with cold sores. Which virus family is most likely responsible?

Accepted Answer

Herpesviridae

Question 11

Which of the following best explains why prion diseases are difficult to treat?

Accepted Answer

Prions lack nucleic acids, so traditional antiviral therapies targeting DNA or RNA are ineffective

Question 12

Which of the following viruses is most likely to cause a persistent infection in humans?

Accepted Answer

Herpes Simplex Virus

Question 13

A patient is diagnosed with Rubella. Which of the following statements is correct regarding this virus?

Accepted Answer

It is an RNA virus that can cause congenital defects if a woman is infected during pregnancy

Question 14

Which of the following equations best represents the burst size in a lytic bacteriophage infection?

Accepted Answer

$$	ext{Burst size} = \frac{	ext{Number of phage particles released}}{	ext{Number of infected bacterial cells}}$$

Question 15

Which of the following viruses is a member of the Filoviridae family and is known for causing severe hemorrhagic fever outbreaks?

Accepted Answer

Ebola virus

Question 16

A patient is diagnosed with influenza. Which of the following best describes the genetic material of the influenza virus?

Accepted Answer

Segmented, negative-sense, single-stranded RNA

Question 17

Which of the following is a key feature of viroids that distinguishes them from viruses?

Accepted Answer

Viroids lack a protein coat and consist solely of a short strand of circular RNA

Question 18

Which of the following viruses is most likely to be oncogenic?

Accepted Answer

Human T-cell Leukemia Virus (HTLV-1)

Question 19

A patient is found to have a persistent viral infection that periodically reactivates, causing cold sores. Which viral property is most responsible for this phenomenon?

Accepted Answer

Latency

Question 20

Which of the following best explains why hepatitis B virus (HBV) can cause both acute and chronic infections?

Accepted Answer

HBV can integrate its DNA into the host genome, allowing for persistent infection

Comprehensive Study Notes on Viruses, Viroids, and Prions

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