28 Questions
Which of the following best describes viruses?
Infectious agents composed of nucleic acid surrounded by a protein coat
What is the primary component of viruses?
Nucleic acid
Are viruses considered living organisms?
No, because they are non-living agents
What are the possible configurations of viral nucleic acid?
Both ssDNA and dsDNA
Which of the following is NOT a possible shape for viral nucleic acid?
Triangular
Which type of nucleic acid can be found in viruses?
Both DNA and RNA
What is the possible configuration of viral nucleic acid?
All of the above
Do viruses have a single type of nucleic acid?
No, they can have both DNA and RNA
Which of the following is NOT a possible shape for viral capsids?
Spherical
What are the three forms of viral capsids?
Helical, polyhedral, complex
Which form of viral capsid is a combination of the helical and polyhedral forms?
Complex
Which of the following best describes host range?
The ability of a virus to infect multiple organisms
What determines the host range of a virus?
The capsid structure of the virus
Which of the following best describes tissue specificity?
The ability of a virus to infect a specific type of tissue in a host organism
Which of the following is NOT a possible host range for Rabies?
Insects
Which of the following is a common characteristic of HIV and Rabies?
They both have a narrow host range
Which type of RNA immediately supplies codes for protein synthesis?
+ssRNA
Which type of RNA serves as a template to make +ssRNA?
-ssRNA
What is the main difference between +ssRNA and -ssRNA?
+ssRNA immediately supplies codes for protein synthesis, while -ssRNA serves as a template to make +ssRNA.
Which of the following best describes a bacteriophage?
A type of virus that infects and replicates within a bacterial cell
What is the primary target of a bacteriophage?
Bacterial cells
What is the main difference between a bacteriophage and a regular virus?
Bacteriophages only infect bacteria, while regular viruses infect animals and plants
Which step of bacteriophage replication involves the release of viral DNA through the tail core?
Penetration
What happens during the Biosynthesis step of bacteriophage replication?
Multiple copies of the phage DNA are synthesized
What happens during the Lysis/Release step of bacteriophage replication?
The mature phage particles burst out from the cell
Which type of phage undergoes the lytic cycle, leading to the death of the cell through cell lysis?
Virulent phages
Which type of phage can become part of a host chromosome and are replicated with the cell genome until they are induced to make newly assembled viruses?
Temperate phages
Which phage example is an illustration of the lytic cycle?
T-even phage
Test your knowledge on viruses with this informative quiz! Learn about the characteristics of these submicroscopic, infectious, and parasitic agents composed of nucleic acid surrounded by a protein coat.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
