VIROLOGY SEM 1

Who first discovered virus?

• Alexander Fleming
• Dmitri Ivanovsky and Martinus Beijerinck
• Louis Pasteur
• Robert Koch

What is temperate phage

• A temperate phage is a type of bacteriophage that can only enter a lysogenic cycle upon infecting a bacterial cell.
• A temperate phage is a type of bacteriophage that can either enter a lytic cycle or a lysogenic cycle upon infecting a bacterial cell.
• A temperate phage is a type of bacteriophage that can only enter a lytic cycle upon infecting a bacterial cell.
• A temperate phage is a type of virus that infects plants.

What is the structure of a virus?

• A protein coat surrounding a nucleic acid core

• A lipid bilayer surrounding a protein coat

• A carbohydrate shell surrounding a protein core

• A nucleic acid core surrounded by a protein coat and a lipid bilayer

How does a virus replicate?

• By dividing into two identical daughter viruses

• By fusing with a host cell and using the host's cellular machinery to replicate

• By undergoing binary fission

• By undergoing meiosis

What is the function of a viral capsid?

• To protect the viral genome

• To facilitate viral attachment to host cells

• To aid in viral replication

• To regulate viral gene expression

What is the difference between a lytic and lysogenic cycle?

• In the lytic cycle, the virus immediately replicates and lyses the host cell, while in the lysogenic cycle, the virus integrates its genome into the host cell's genome and remains dormant for a period of time

• In the lytic cycle, the virus integrates its genome into the host cell's genome and remains dormant for a period of time, while in the lysogenic cycle, the virus immediately replicates and lyses the host cell

• There is no difference between the lytic and lysogenic cycles

• The lytic cycle occurs in bacteria, while the lysogenic cycle occurs in viruses

What is the difference between a virus and a bacterium?

• A virus is a living organism, while a bacterium is not

• A virus is smaller than a bacterium

• A virus can only replicate inside a host cell, while a bacterium can replicate on its own

• A virus is a type of bacterium

What is the function of a viral envelope?

• To protect the viral genome

• To facilitate viral attachment to host cells

• To aid in viral replication

• To regulate viral gene expression

What is the difference between a bacteriophage and a virus?

• A bacteriophage infects bacteria, while a virus can infect various types of cells

• A bacteriophage is a type of virus that infects plants, while a virus infects animals

• A bacteriophage is a type of bacteria, while a virus is a type of fungus

• A bacteriophage is a type of virus that infects bacteria, while a virus infects plants

What is the structure of a bacteriophage?

• A protein coat surrounding a nucleic acid core

• A lipid bilayer surrounding a protein coat

• A carbohydrate shell surrounding a protein core

• A nucleic acid core surrounded by a protein coat and a lipid bilayer