List of top Biology Questions on Immunology

After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s)/tissue(s) like:
A. thymus
B. bone marrow
C. spleen
D. lymph nodes
E. Peyer's patches
Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body?
Identify the statement that is NOT correct.
Immunity in our body is of two types: (i) Innate immunity and (ii) acquired immunity. Innate immunity is a non-specific defence mechanism, whereas acquired immunity is pathogen-specific; it is called specific immunity too. Acquired immunity is characterised by memory. Antibodies are specific to antigens and there are different types of antibodies produced in our body: they are IgA, IgE, IgG, IgC, and IgM. It shows primary response when it encounters the pathogen for the first time and secondary response during the subsequent encounters with the same antigen/pathogen. Name the two types of specialised cells which carry out the primary and secondary immune response.
Immunity in our body is of two types: (i) Innate immunity and (ii) acquired immunity. Innate immunity is a non-specific defence mechanism, whereas acquired immunity is pathogen-specific; it is called specific immunity too. Acquired immunity is characterised by memory. Antibodies are specific to antigens and there are different types of antibodies produced in our body: they are IgA, IgE, IgG, IgC, and IgM. It shows primary response when it encounters the pathogen for the first time and secondary response during the subsequent encounters with the same antigen/pathogen.

Why is the antibody-mediated immunity also called humoral immune response?

Immunity in our body is of two types: (i) Innate immunity and (ii) acquired immunity. Innate immunity is a non-specific defence mechanism, whereas acquired immunity is pathogen-specific; it is called specific immunity too. Acquired immunity is characterised by memory. Antibodies are specific to antigens and there are different types of antibodies produced in our body: they are IgA, IgE, IgG, IgC, and IgM. It shows primary response when it encounters the pathogen for the first time and secondary response during the subsequent encounters with the same antigen/pathogen.

(d) How is active immunity different from passive immunity?

Immunity in our body is of two types: (i) Innate immunity and (ii) acquired immunity. Innate immunity is a non-specific defence mechanism, whereas acquired immunity is pathogen-specific; it is called specific immunity too. Acquired immunity is characterised by memory. Antibodies are specific to antigens and there are different types of antibodies produced in our body: they are IgA, IgE, IgG, IgC, and IgM. It shows primary response when it encounters the pathogen for the first time and secondary response during the subsequent encounters with the same antigen/pathogen.

(c) The organ transplants are often rejected if not taken from suitable compatible persons. [(i)] Mention the characteristic of our immune system that is responsible for the graft rejection. [(ii)] Name the type of immune response and the cell involved in it.

The decrease in the T-Lymphocytes count in human blood will finally result in
Match List-I with List-II:
List-I
Types of barriers		List-II
Examples
(A) Cytokine barriers(IV) Interferons
(B) Physical barriers(I) Mucus coating
(C) Cellular barriers(III) Phagocytosis
(D) Physiological barriers(II) Tears from eyes

Choose the correct answer from the options given below:
Antibodies are secreted by:
Match List I with List II :
List - I List – II 
A.Malignant tumorsi.Destroy tumors
B.MALTii.. AIDS
C.NACOiii.Metastasis
D.\( \alpha-Interferons\)iv.Lymphoid tissue
Choose the correct answer from the options given below :
Given below are two statements:
Statement I: Antibiotics are chemicals produced by microbes that kill other microbes.
Statement II: Antibodies are chemicals formed in body that eliminate microbes.
In the light of the above statements, choose the most appropriate answer from the options given below.
Which one of the following antibody types protects against inhaled and ingested pathogens?
What is the length of peptides binding to Major Histocompatibility Complex (MHC) class II molecule?
Antibody diversity is an example of:
The specificity in an antibody molecule is provided by the:
The allergic immune response is characterized by the increased levels of:
Regulatory B cells (Bregs) are important mediators of adaptive immunity and function mainly via the secretion of:
Myasthenia gravis is an autoimmune disease where the patient makes antibodies for its own:
Which of the following immunoglobulins primarily pass through the placenta to provide passive immunity to the fetus?
CD4 antigen is absent on
Which one of the following statements about AIDS caused by HIV is correct?
The presence of antibody in infected patient's serum can be detected by

Given below are two statement - one is labelled as Assertion A and the other is labelled as Reason R: 
Assertion A: Bacterial lipopolysaccharide (LPS) on its own does not induce memory B-cell in humans.
Reason R: LPS does not activate T-cell.
In light of the above statements, choose the most appropriate answer from the options given below:

Choose the option that correctly matches for an immunosuppressant and its origin