Posted On : 26-Mar-2020

Q1: Which factor may help determine the antigenicity of a virus?

• A. The size of the virus
• B. The internal proteins
• C. Some of the capsomers
• D. The whole capsid

Q2: Reverse transcriptase is known for having poor proofreading activity. What would be a consequence of this?

• A. It establishes lifelong infection in the host
• B. It makes each new viral generation more viable
• C. It could cause the host cell to incorrectly proofread as well
• D. It could add to the virulence and transmission of the virus

Q3: An antiviral drug specifically modifies viral receptors on a eukaryotic host cell. How might this affect the viral reproductive cycle?

• A. It would enhance the process of viral apoptosis
• B. It would prevent the virus from attaching to the host cell
• C. It would result in the degeneration of the viral capsid
• D. It would facilitate the process of viral endocytosis

Q4: What is a hallmark characteristic of reverse transcriptase?

• A. It allows the virus to infect bacteria through endocytosis
• B. It is encoded in the host cell’s genome
• C. It challenges the central dogma of biology (DNA → RNA → Protein)
• D. It reads the genetic material backwards (3’ → 5’)

Q5: Which central dogma of genetics had to be revisited after the discovery of a retrovirus?

• A. RNA replication cannot occur prior to translation
• B. Messenger RNA does not always code for proteins
• C. DNA makes RNA that makes protein
• D. Transcriptase assists in the formation of proteins

Q6: Which factor may help determine the antigenicity of a virus?

• A. The internal proteins
• B. The whole capsid
• C. Some of the capsomers
• D. The size of the virusTake

Q7: What distinguishes prions from viruses?

• A. Ability to cause infection
• B. Presence of an envelope
• C. Type of protein arrangement
• D. Absence of genetic material

Q8: Oncoviruses are a type of animal virus that can cause a neoplasm - an abnormal, often excessive, growth of tissue. Which type of virus is likely to be an oncovirus?

• A. Bacteriophage viruses
• B. Lytic viruses
• C. Enveloped viruses
• D. Lysogenic viruses

Q9: A hybridization probe is a fragment of genetic material that is used to to detect the presence of nucleotide sequences. Which infectious agent could not be detected with a probe?

• A. A prion
• B. A virus with single-stranded DNA material
• C. A virus with double-stranded RNA material
• D. A retrovirus

Q10: A scientist is investigating a specimen in a laboratory. She is attempting to determine whether it is a virus or not. Which of the following would allow her to conclude that it is not a virus?

• A. The specimen has no organelles
• B. The specimen has a protein coat
• C. The specimen is extremely small
• D. The specimen contains DNA and RNA