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.

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.
by

1 Answer

Answer :

(c) interferon
by

Related questions

6. An antiviral protein released from infected and dying cell a) antigen b) antibody c) antiserum d) interferon

Description : 6. An antiviral protein released from infected and dying cell a) antigen b) antibody c) antiserum d) interferon

Last Answer : d) interferon

Which one of the following statements about interferon is FALSE? a. Interferon is produced in response to a viral infection. b. Interferon is a naturally produced protein. c. Interferon puts uninfected cells in an antiviral stated. Interferon is a protein that binds to RNA virus genomes..

Description : Which one of the following statements about interferon is FALSE? a. Interferon is produced in response to a viral infection. b. Interferon is a naturally produced protein. c. Interferon puts uninfected cells in an antiviral state. d. Interferon is a protein that binds to RNA virus genomes.

Last Answer : d. Interferon is a protein that binds to RNA virus genomes.

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

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)

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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

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

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Last Answer : Answer : D

The following are true about cell-mediated immunity: a. antigen-specific function is the role of the T-lymphocytes b. cell-mediated immunity can activate the complement system c. it is responsible for the delayed hypersensitivity reaction. d. Gamma interferon is an important mediator of B-cell activation.

Description : The following are true about cell-mediated immunity: a. antigen-specific function is the role of the T-lymphocytes b. cell-mediated immunity can activate the complement system c. it is ... the delayed hypersensitivity reaction. d. Gamma interferon is an important mediator of B-cell activation.

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Regarding interferon: a. it is a virus specific molecules b. it acts by neutralizing exotoxin c. it enhances the histocompatibility antigen on cell surface and thereby activate the T cells d. it exerts its effect by integrating itself with the DNA of virus infected cells

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Last Answer : it enhances the histocompatibility antigen on cell surface and thereby activate the T cells

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

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

Last Answer : Answer : C

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.

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

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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

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

Severe combined immunodeficiency disease refers to a condition wherein a patient a. Cannot produce T and B cells.b. Interferon. c. Antigen-presenting cells. d. Hydrogen peroxide in phagocytes

Description : Severe combined immunodeficiency disease refers to a condition wherein a patient a. Cannot produce T and B cells. b. Interferon. c. Antigen-presenting cells. d. Hydrogen peroxide in phagocytes

Last Answer : a. Cannot produce T and B cells.

Clonal selection includes a. Antigen-receptor binding on B cells. b. Antibody secretion recognizing same epitope as on B cell receptors. c. Differentiation of B cells into plasma cells and memory cells. d. All the above (A—C) are correct.

Description : Clonal selection includes a. Antigen-receptor binding on B cells. b. Antibody secretion recognizing same epitope as on B cell receptors. c. Differentiation of B cells into plasma cells and memory cells. d. All the above (A—C) are correct.

Last Answer : d. All the above (A—C) are correct.

The drug, Interleukin-2, is an example of which type of biologic response modifier? a) Cytokine Other cytokines include interferon alfa and filgrastim. b) Monoclonal antibodies Monoclonal antibodies include rituximab, trastuzumab, and gemtuzumab. c) Retinoids Retinoic acid is an example of a retinoid. d) Antimetabolites Antimetabolites are cell cycle-specific antineoplastic agents.

Description : The drug, Interleukin-2, is an example of which type of biologic response modifier? a) Cytokine Other cytokines include interferon alfa and filgrastim. b) Monoclonal antibodies Monoclonal ... an example of a retinoid. d) Antimetabolites Antimetabolites are cell cycle-specific antineoplastic agents.

Last Answer : a) Cytokine Other cytokines include interferon alfa and filgrastim.

What is true about human interferon α: A. It is used to treat HIV infection B. It is used to treat Kaposi‘s sarcoma in AIDS patients C. It is curative for hepatitis B virus infection D. It is active orally

Description : What is true about human interferon α: A. It is used to treat HIV infection B. It is used to treat Kaposi‘s sarcoma in AIDS patients C. It is curative for hepatitis B virus infection D. It is active orally

Last Answer : B. It is used to treat Kaposi‘s sarcoma in AIDS patients

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 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

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

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.

What are the forces that are responsible for antigen-antibody reactions ?

Description : What are the forces that are responsible for antigen-antibody reactions ?

Last Answer : The process that holds antigen-antibody together is called non-specific interactions. Inter molecular forces may be classified into four- Electrostatic bonds Hydrogen bonds Hydrophobic interactions Vander Val interactions

Explain in brief about electrostatic bonds in antigen-antibody interaction ?

Description : Explain in brief about electrostatic bonds in antigen-antibody interaction ?

Last Answer : These are formed due to the attraction between opposite charged protein side chains.

Explain in brief about hydrogen bonds antigen-antibody interaction ?

Description : Explain in brief about hydrogen bonds antigen-antibody interaction ?

Last Answer : Reversible hydrogen bonds are formed between hydrophilic groups such as hydroxyl, amino and carboxylic group. Although hydrogen bonds are relatively weak, they play an important role in interaction of antigen-antibody.

Explain in brief about hydrophobic interactions in antigen-antibody interaction ?

Description : Explain in brief about hydrophobic interactions in antigen-antibody interaction ?

Last Answer : Contribute up to 50% of the total strength of antigen- antibody interactions. These reactions are found when ever the side chains of non-polar amino acids of antigen-antibody come together.

Explain in brief about Vander Val interactions in antigen-antibody interaction ?

Description : Explain in brief about Vander Val interactions in antigen-antibody interaction ?

Last Answer : Temporary transfer of electrons from one molecule to another will result in the force of attraction between them. This is seen when the interacting molecules come close to each other.

Into how many types is antigen-antibody reactions are broadly classified ?

Description : Into how many types is antigen-antibody reactions are broadly classified ?

Last Answer : It is broadly classified into five- Precipitation Agglutination Complement fixation Immunoassay using labeled reagents Immunohistrochemistry (Immunoflourescence)

Blood group AB has – (1) No antigen (2) No antibody (3) Neither antigen nor antibody (4) Both antigen and antibody

Description : Blood group AB has – (1) No antigen (2) No antibody (3) Neither antigen nor antibody (4) Both antigen and antibody

Last Answer : (2) No antibody Explanation: Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood plasma does not contain any antibodies against either A or B ... preferable), but cannot donate blood to any group other than AB. They are known as universal recipients.

An Antigen is – (1) the result of Antibody (2) the opposite of Antibody (3) the stimulus for Antibody formation (4) the residue of an Antibody

Description : An Antigen is – (1) the result of Antibody (2) the opposite of Antibody (3) the stimulus for Antibody formation (4) the residue of an Antibody

Last Answer : (3) the stimulus for Antibody formation Explanation: Antigens are defined as substances recognized by the body as foreign, causing the body to produce an antibody to react specifically with ... a result of stimulation by an antigen which can then interact specifically with that particular antigen.

Reaction of soluble antigen with antibody is ____A. Agglutination B. Precipitation C. Flocculation D. CFT

Description : Reaction of soluble antigen with antibody is ____A. Agglutination B. Precipitation C. Flocculation D. CFT

Last Answer : Precipitation

Blood group AB has (a) no antigen (b) no antibody (c) neither antigen nor antibody (d) both antigen and antibody.

Description : Blood group AB has (a) no antigen (b) no antibody (c) neither antigen nor antibody (d) both antigen and antibody.

Last Answer : (b) no antibody

What is correct for blood group O? (a) No antigens but both a and b antibodies are present. (b) A antigen and b antibody present. (c) Antigen and antibody both absent. (d) A and B antigens and a, b antibodies present.

Description : What is correct for blood group O? (a) No antigens but both a and b antibodies are present. (b) A antigen and b antibody present. (c) Antigen and antibody both absent. (d) A and B antigens and a, b antibodies present.

Last Answer : (a) No antigens but both a and b antibodies are present.

Person with blood group AB is considered as universal recipient because he has (a) both A and B antigens on RBC but no antibodies in the plasma (b) both A and B antibodies in the plasma (c) no antigen on RBC and no antibody in the plasma (d) both A and B antigens in the plasma but no antibodies.

Description : Person with blood group AB is considered as universal recipient because he has (a) both A and B antigens on RBC but no antibodies in the plasma (b) both A and B antibodies in the plasma (c) no antigen on RBC and no antibody in the plasma (d) both A and B antigens in the plasma but no antibodies.

Last Answer : (a) both A and B antigens on RBC but no antibodies in the plasma

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.

Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? A- By rearrangements of the DNA encoding the variable regions of the heavy and light chains B- By the combination of different heavy and light chains that form the antigen binding siteC- Antibody proteins can physically change their shape to bind different epitopes D- Both (a) and (b)

Description : Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? A- By rearrangements of the DNA encoding the variable regions of the heavy ... proteins can physically change their shape to bind different epitopes D- Both (a) and (b)

Last Answer : Both (a) and (b)

A patient with no positive history came along for scaling. The moment you pick up the scaler you punch your finger, what should you do? A. Complete the procedure as nothing has happened B. Check patient’s blood for epatitis B antibody BsAb C. Check patient’s blood for epatitis B antigen BsAg D. Check dentist’s blood for epatitis B antibody BsAb and IV antigen IVAg E.

Description : A patient with no positive history came along for scaling. The moment you pick up the scaler you punch your finger, what should you do? A. Complete the procedure as nothing has happened B. Check ... B antigen BsAg D. Check dentist's blood for epatitis B antibody BsAb and IV antigen IVAg E.

Last Answer : A. Complete the procedure as nothing has happened

Which among the following is based on antigen-antibody interaction?

Description : 7. 2. Which among the following is based on antigen-antibody interaction? (a) PCR (b) Electrophoresis (c) ELISA (d) All of these.

Last Answer : 7. (c) ELISA

Which among the following is based on antigen-antibody interaction?

Description : 5. Which among the following is based on antigen-antibody interaction? (a) PCR (b) Electrophoresis (c) ELISA (d) All of these.

Last Answer : (c) ELISA

The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Description : The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Last Answer : C. Morphine

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’ are correct

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’ are correct

Last Answer : B. Causes bronchodilatation

The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Description : The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Last Answer : C. Morphine

Effector functions of antigen antibody reaction

Description : Effector functions of antigen antibody reaction

Last Answer : 1) As two or more Fc portions are required to stimulate effector functions so effector functions are carried out only by molecules with bound antigens and not with free Ig. 2) Fc region of ... chains are called isotypes. Five heavy chain isotypes and two light chain isotypes are present in humans. 

Blood group AB has (1) No antigen (2) No antibody (3) Neither antigen nor antibody (4) Both antigen and antibody

Description : Blood group AB has (1) No antigen (2) No antibody (3) Neither antigen nor antibody (4) Both antigen and antibody 

Last Answer : No antibody