On exposure to any antigen, the first antibody to be formed is of the following class: (A) IgA (B) IgG (C) IgM (D) IgE

On exposure to any antigen, the first antibody to be formed is of the following class: (A) IgA (B) IgG (C) IgM (D) IgE
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Answer : C
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Last Answer : c. IgA.

Resistance to disease in the passageways of the respiratory and gastrointestinal tract is dependent on antibodies in the class _____. a. IgG b. IgA c. IgE d. IgM

Description : Resistance to disease in the passageways of the respiratory and gastrointestinal tract is dependent on antibodies in the class _____. a. IgG b. IgA c. IgE d. IgM

Last Answer : b. IgA

The immunoglobulin having the longest half-life is (A) IgA (B) IgG (C) IgM (D) IgE

Description : The immunoglobulin having the longest half-life is (A) IgA (B) IgG (C) IgM (D) IgE

Last Answer : Answer : B

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Description : An immunoglobulin found in exocrine secretions is (A) IgA (B) IgG (C) IgM (D) IgE

Last Answer : Answer : A

The _____ class of antibodies is the principal component of a secondary antibody response. a. IgM b. IgD c. IgG d. IgE

Description : The _____ class of antibodies is the principal component of a secondary antibody response. a. IgM b. IgD c. IgG d. IgE

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Complement system can be activated by binding of antigen to (A) IgA (B) IgD (C) IgE (D) IgM

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The colostrum, or first milk of a nursing mother, contains _____ that is transferred to the nursing child. a. IgA b. IgG c. IgM d. IgE

Description : The colostrum, or first milk of a nursing mother, contains _____ that is transferred to the nursing child. a. IgA b. IgG c. IgM d. IgE

Last Answer : a. IgA

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Description : Reaginic antibody is (A) IgA (B) IgG (C) IgD (D) IgE

Last Answer : Answer : D

why IgM and IgE are longer than IgG , IgD and IgA?

Description : why IgM and IgE are longer than IgG , IgD and IgA?

Last Answer : Immunoglobulin G (IgG), the most abundant type of antibody, is found in all body fluids and protects against bacterial and viral infections. Immunoglobulin M (IgM), which is found mainly in the blood and lymph fluid, is the first antibody to be made by the body to fight a new infection.

Allergy is immediate hypersensitivity mediated by _____and mast cell degranulation a) IgG b) IgE c) IgM d) IgA e) IgD

Description : Allergy is immediate hypersensitivity mediated by _____and mast cell degranulation a) IgG b) IgE c) IgM d) IgA e) IgD

Last Answer : Ans: B

Which of the following classes of immunoglobulins is important in immunity to T. vaginalis? A A. IgA B. IgG C. IgE D. IgM

Description : Which of the following classes of immunoglobulins is important in immunity to T. vaginalis? A A. IgA B. IgG C. IgE D. IgM

Last Answer : IgA

14.The immunoglobulin present in colostrum is (a) IgE (b) IgM (c) IgG (d) IgA

Description : 14.The immunoglobulin present in colostrum is (a) IgE (b) IgM (c) IgG (d) IgA

Last Answer : (b) IgM

In allergic diseases, the concentration of the following is increased in plasma: (A) IgA (B) IgG (C) IgD (D) IgE

Description : In allergic diseases, the concentration of the following is increased in plasma: (A) IgA (B) IgG (C) IgD (D) IgE

Last Answer : Answer : D

Allergic reactions are mediated by (A) IgA (B) IgG (C) IgD (D) IgE

Description : Allergic reactions are mediated by (A) IgA (B) IgG (C) IgD (D) IgE

Last Answer : Answer : D

Gamma heavy chains are present in (A) IgA (B) IgG (C) IgM (D) IgD

Description : Gamma heavy chains are present in (A) IgA (B) IgG (C) IgM (D) IgD

Last Answer : Answer : B

The largest immunoglobulin is (A) IgA (B) IgG (C) IgM (D) IgD

Description : The largest immunoglobulin is (A) IgA (B) IgG (C) IgM (D) IgD

Last Answer : Answer : C

The most abundant immunoglobulin in plasma is (A) IgA (B) IgG (C) IgM (D) IgD

Description : The most abundant immunoglobulin in plasma is (A) IgA (B) IgG (C) IgM (D) IgD

Last Answer : Answer : B

Secretory component is present in (A) IgA (B) IgG (C) IgM (D) All of these

Description : Secretory component is present in (A) IgA (B) IgG (C) IgM (D) All of these

Last Answer : Answer : A

Which AB is responsible for atopy? A. IgA B. IgE C. IgG D. IgW

Description : Which AB is responsible for atopy? A. IgA B. IgE C. IgG D. IgW

Last Answer : Ans: B

Which is the only immunoglobulin that can cross the placenta? a. IgA b. IgD c. IgE d. IgG

Description : Which is the only immunoglobulin that can cross the placenta? a. IgA b. IgD c. IgE d. IgG

Last Answer : d. IgG

Which of the following mediates Type I hypersensitivity reaction? A- IgE B- IgG C- IgM D- IgD

Description : Which of the following mediates Type I hypersensitivity reaction? A- IgE B- IgG C- IgM D- IgD

Last Answer : IgE

Which of the following immunoglobulins does constitute the largest percentage in human milk? (a) IgA (b) IgG (c) IgD (d) IgM

Description : Which of the following immunoglobulins does constitute the largest percentage in human milk? (a) IgA (b) IgG (c) IgD (d) IgM

Last Answer : (a) IgA

The maternal _____ antibodies remain with the child for approximately three to six months after birth providing immunity after birth. a. IgA b. IgG c. IgM d. IgD

Description : The maternal _____ antibodies remain with the child for approximately three to six months after birth providing immunity after birth. a. IgA b. IgG c. IgM d. IgD

Last Answer : b. IgG

Of the five classes of antibodies,_____ and_____ are primary disease fighters, while secretory _____ is found on body (mucosal) surfaces. a. IgA, IgG, IgD b. IgG, IgA, IgM c. IgG, IgD, IgM d. IgG, IgM, IgA

Description : Of the five classes of antibodies,_____ and_____ are primary disease fighters, while secretory _____ is found on body (mucosal) surfaces. a. IgA, IgG, IgD b. IgG, IgA, IgM c. IgG, IgD, IgM d. IgG, IgM, IgA

Last Answer : d. IgG, IgM, IgA

An antigen binding site on the IgG antibody is a combination of a. One variable region from a light chain and one from a heavy chain. b. Two variable regions from two light chains. c. Two variable regions from two heavy chainsd. One variable region from a constant region and one from a variable region..

Description : An antigen binding site on the IgG antibody is a combination of a. One variable region from a light chain and one from a heavy chain. b. Two variable regions from two light chains. c. Two ... from two heavy chains. d. One variable region from a constant region and one from a variable region.

Last Answer : a. One variable region from a light chain and one from a heavy chain.

An immunoglobulin which can cross the placental barrier is (A) IgA (B) IgM (C) IgD (D) None of these

Description : An immunoglobulin which can cross the placental barrier is (A) IgA (B) IgM (C) IgD (D) None of these

Last Answer : Answer : D

Which one of the following is true of IgE? 1) Is present in plasma in the same concentration as IgG 2) Is increased acutely in an asthmatic attack 3) Crosses the normal placenta 4) Is increased in the serum of atopic individuals 5) Is involved in type 2 hypersensitivity

Description : Which one of the following is true of IgE? 1) Is present in plasma in the same concentration as IgG 2) Is increased acutely in an asthmatic attack 3) Crosses the normal placenta 4) Is increased in the serum of atopic individuals 5) Is involved in type 2 hypersensitivity

Last Answer : Answers-4 IgG is the predominant form of immunoglobulin in plasma at a concentration around 10,000 times that of IgE. IgG crosses the placenta to confer immunity to the fetus but IgE does ... frequently increased in those with atopy but serum IgE does not rise acutely during an asthmatic attack.

An essential element of all allergy reactions is the a. Release of interferons from tissue cells. b. Accumulation of ige on the surfaces of mast cells and basophils. c. Passage of igg from the immune system to local tissue cells. d. Elimination of all traces of plasma cells from the body.

Description : An essential element of all allergy reactions is the a. Release of interferons from tissue cells. b. Accumulation of ige on the surfaces of mast cells and basophils. c. Passage of igg from the immune system to local tissue cells. d. Elimination of all traces of plasma cells from the body.

Last Answer : b. Accumulation of ige on the surfaces of mast cells and basophils.

IgG and IgM levels raised in parasitic infections like D A. Malaria B. Leishmaniasis C. Schistosomiasis D. All above

Description : IgG and IgM levels raised in parasitic infections like D A. Malaria B. Leishmaniasis C. Schistosomiasis D. All above

Last Answer : All above

The test used to detect raised levels of IgG and IgM in Trypanosoma evansi infected individuals is the D A. Thymol turbidity test B. Card agglutination test C. Mercuric chloride test D. Formol gel test

Description : The test used to detect raised levels of IgG and IgM in Trypanosoma evansi infected individuals is the D A. Thymol turbidity test B. Card agglutination test C. Mercuric chloride test D. Formol gel test

Last Answer : Formol gel test

Titer refers to a. The most concentrated antigen-antibody concentration showing a reaction.b. The first diluted antigen-antibody concentration showing a reaction. c. The precipitation line formed between an antigen-antibody reaction. d. The most dilute antigen-antibody concentration showing a reaction.

Description : Titer refers to a. The most concentrated antigen-antibody concentration showing a reaction. b. The first diluted antigen-antibody concentration showing a reaction. c. The precipitation line ... antigen-antibody reaction. d. The most dilute antigen-antibody concentration showing a reaction.

Last Answer : d. The most dilute antigen-antibody concentration showing a reaction.

A cell-coded protein that is formed in response to infection, with most animal viruses, is called (a) histone (b) antibody (c) interferon (d) antigen.

Description : A cell-coded protein that is formed in response to infection, with most animal viruses, is called (a) histone (b) antibody (c) interferon (d) antigen.

Last Answer : (c) interferon

In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Description : In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Last Answer : B.Antigens and antibodies are in optimal proportion

In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Description : In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Last Answer : B.Antigens and antibodies are in optimal proportion

Which of the following statement(s) is/are true concerning the antibody response to an invading antigen? a. All antibodies are composed of one type of heavy and one type of light protein chain b. The carboxyl terminus of the heavy chain is the antigen binding site c. Antibody of the immunoglobulin G class is the initial antibody produced in response to an antigenic stimulus d. Immunoglobulins A, D, and E play an active role in the circulating humoral response

Description : Which of the following statement(s) is/are true concerning the antibody response to an invading antigen? a. All antibodies are composed of one type of heavy and one type of light protein chain b. ... stimulus d. Immunoglobulins A, D, and E play an active role in the circulating humoral response

Last Answer : Answer: a Humoral defenses consist of antibody (immunoglobulin; Ig) and complement. All Ig classes (IgM, IgG, IgA, IgE, IgD) and IgG subclasses are composed of one type (M, G, A, E, D ... exist in smaller amounts in the circulation and do not appear to play a major role as host defense components

Type I ADR reactions is___________ a) Caused when T-cells bind to a specific antigen b) Caused by tissue injury c) IgE mediated d) Caused by cytotoxic antibodies

Description : Type I ADR reactions is___________ a) Caused when T-cells bind to a specific antigen b) Caused by tissue injury c) IgE mediated d) Caused by cytotoxic antibodies

Last Answer : c) IgE mediated 

The alternate complement pathway doesn’t involve (A) Antigen-antibody complex (B) Complement 3 (C) Factors B and D (D) Membrane attack unit

Description : The alternate complement pathway doesn’t involve (A) Antigen-antibody complex (B) Complement 3 (C) Factors B and D (D) Membrane attack unit

Last Answer : Answer : A

Antigens and haptens have the following similarity: (A) They have high molecular weights (B) They can elicit immune response by themselves (C) They can elicit an immune response only in association with some other large molecule (D) Once an immune response develops, free antigen and free hapten can be recognized by the antibody

Description : Antigens and haptens have the following similarity: (A) They have high molecular weights (B) They can elicit immune response by themselves (C) They can elicit an immune response only in association ... ) Once an immune response develops, free antigen and free hapten can be recognized by the antibody

Last Answer : Answer : D

The portion of the antigen molecule which is recognized by antibody is known as (A) Hapten (B) Epitope (C) Complement (D) Variable region

Description : The portion of the antigen molecule which is recognized by antibody is known as (A) Hapten (B) Epitope (C) Complement (D) Variable region

Last Answer : Answer : B

What is the difference between an antibody and an antigen?

Description : What is the difference between an antibody and an antigen?

Last Answer : A: An antigen is any substance that can elicit an immune response, while an antibody is a protein produced by the immune system in response to an antigen that binds specifically to that antigen to help neutralize or eliminate it from the body.

Which of the following is based upon the principle of antigen - antibody interaction?

Description : Which of the following is based upon the principle of antigen - antibody interaction?

Last Answer : Which of the following is based upon the principle of antigen - antibody interaction? A. PCR B. ELISA C. r-DNA technology D. RNA

Antigen binding site in an antibody is found between:

Description : Antigen binding site in an antibody is found between:

Last Answer : Antigen binding site in an antibody is found between: A. two light chains B. two heavy ... one light chain depending upon the nature of antigen

The antigen -binding sites are present where on the antibody molecule

Description : The antigen -binding sites are present where on the antibody molecule

Last Answer : The antigen -binding sites are present where on the antibody molecule A. on light chain as well as ... region of light chain D. on heavy chain only

Antigen binding site in an antibody is found between:

Description : Antigen binding site in an antibody is found between:

Last Answer : Antigen binding site in an antibody is found between: A. two light chains B. two heavy ... one light chain depending upon the nature of antigen

The following statement(s) is/are true concerning newer detection methods of systemic infection. a. Enzyme-linked immunosorbent assay (ELISA) is a rapid immunologic assay used for both antigen and antibody detection b. Southern, northern, and western immunoblot techniques are used to detect DNA, RNA, or proteins, respectively c. Polymerase chain reaction (PCR) is a sensitive assay used to detect small amounts of microbial DNA, thus detecting infection at its early stages d. Infectious agents currently detected using advanced molecular techniques include cytomegalovirus (CMV) and human immunodeficiency virus (HIV)

Description : The following statement(s) is/are true concerning newer detection methods of systemic infection. a. Enzyme-linked immunosorbent assay (ELISA) is a rapid immunologic assay used for ... detected using advanced molecular techniques include cytomegalovirus (CMV) and human immunodeficiency virus (HIV)

Last Answer : Answer: a, b, c, d Although the classic detection of infection based on clinical signs of infection and bacterial culture remain the most common clinical tools, increasing ... including CMV and HIV. Furthermore, preliminary investigations into possible detection of fungal pathogens are underway

In a patient of bronchial asthma, inhaled salbutamol produces the following effect(s). (a) Inhibits antigen-antibody reaction in the lungs (b) Causes bronchodilatation (c) Reduces bronchial hyperreactivity (d) Both (b) and (c)

Description : In a patient of bronchial asthma, inhaled salbutamol produces the following effect(s). (a) Inhibits antigen-antibody reaction in the lungs (b) Causes bronchodilatation (c) Reduces bronchial hyperreactivity (d) Both (b) and (c)

Last Answer : Ans: B

What is an antigen and antibody interaction ?

Description : What is an antigen and antibody interaction ?

Last Answer : Antigen-antibody interaction is similar to an enzyme substrate interaction. The reaction between antigen and antibody occurs in two stages. Primary stage is the initial interaction of antigen-antibody ... as precipitation, lysis of cells, neutralization of toxins and fixation of compliments etc.

Give some general features of antigen-antibody interaction ?

Description : Give some general features of antigen-antibody interaction ?

Last Answer : The reaction is specific and antigen combines only with its corresponding antibody and vice versa. Entire molecules react but not the fragment. There is no denaturation of antigen or ... reactions. Antigens and antibodies can combine in various proportions unlike chemicals with fixed valancy.