Virus-Host Interaction - Multiple Choice Questions

Q.) Which of the following is the most special characteristic of the adaptive immune system?

Clonal expansion of pre-existing antibodies and/or T cells

Memory T cells

Very rapid response to infection

Antibodies

Q.) What happens during the 'incubation period'?

This period commonly lasts for a few hours

This period commonly lasts for a few days

The virus is cleared from the body by the immune system

Virus replication happens at an intracellular level

Q.) Cytotoxic T cells can be activated via which of the following?

By identifying virus peptides presented by antibodies

By identifying virus peptides presented by MHC-I

By reacting with budding viruses

By releasing complement

Q.) Poliovirus can most easily become more virulent by which of the following processes?

Recombining with another enterovirus

Mutation of the RNA genome at only a few positions

Multiple nucleotide deletions and substitutions

Altering its protein coat

Q.) How are antibody producing cells stimulated?

Interacting with a virus short peptide

Interacting with a virus infected cell

Interacting with a T helper cell.

Interacting with a plasma cell

Q.) Interferons are very special defence mechanisms which operate by:

Binding to neighbouring cells

Inhibiting virus induced enzymes

Binding to viruses

Producing a long lasting state of resistance

Q.) What is the most common way for a virus to kill a cell?

Dissolves the cellular membrane

Fragments cellular DNA

Totally blocks cellular transcription

Induces apoptosis via caspases

Q.) Papillomaviruses cause warts and cancer but how do they most often infect humans?

Are airborne

Are Nosocomial and spread in hospitals

Via scratches and breaks in the skin

Are water borne

Q.) A special feature of adaptive immunity is:

Ability to distinguish viruses and bacteria

Ability to distinguish self and non self

Speed of response to a foreign protein

None of these

Q.) Many virus infections result in immune pathology, this is caused predominantly by which of the following?

A response of killer T cells (CD-8)

A cytokine storm

A decline in function of the immune system

Antibody mediated reactions