A research study investigates the immune response to a novel viral pathogen. It is observed that neutralizing antibodies are generated within the first week of infection, but cytotoxic T cell responses are delayed, appearing only after two weeks. Which of the following is the MOST likely explanation for this observation?
The virus infects and depletes T cells initially.
The virus evades MHC class I presentation, delaying CTL responses.
Antibody responses are T-independent while robust CTL responses require T cell help.
The virus replicates primarily in B cells, promoting antibody production.
Related Questions
Antigen binding site in an antibody is found between
Two light chains
Two heavy chains
One heavy and one light chain
Either between two light chains or between one heavy and one light chain depending upon the nature of antigen
Which of the following cells are involved in defence mechanism of the body?
Macrophages
Neutrophils
Lymphocytes
All of these
Active immunity development is related to
Natural killer cells
Memory cells
Helper T-cells
Suppressor T-cells
The progenitors that are formed in bone marrow and differentiated elsewhere are
Pre NK-cells
Pre-erythroblast
Pre T-cells
Myeloblast
T-lymphocytes differentiate and matured in
Bone marrow
Kidneys
Liver
Thymus gland
Use of anti-histamines and steroids give a quick relief form
Allergy
Nausea
Cough
Headache
What is the primary function of MHC class I molecules?
Present extracellular antigens to helper T cells
Present intracellular antigens to cytotoxic T cells
Present antigens to B cells
Activate macrophages
A person is injected with globulin against hepatitis. This is
Artificially acquired passive immunity
Artificially acquired active immunity
Naturally acquired active immunity
Naturally acquired passive immunity
The full form of SCID is
Severe Combined Immunodeficiency
Sudden Cardiac Insufficiency Disorder
Structural Cardiac Information Database
Systematic Clinical Information Device
Which of the following best describes an autoimmune disorder?
The immune system attacking the body's own cells
The body failing to produce antibodies
A weakened immune response to pathogens
An overreaction to harmless allergens
