Tag: antibodies and antitoxin

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Questions Related to antibodies and antitoxin

Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Lysis of foreign cells is mediated through

  1. IgM only

  2. IgA only

  3. IgM and IgG

  4. IgD and IgE
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Immunoglobulin M (IgM) is one of several forms of the antibody that are produced by vertebrates. IgM is the largest antibody, and it is the first antibody to appear in the response to initial exposure to an antigen. IgM can bind to complement component and activate the classical pathway, leading to opsonization of antigens and cytolysis (lysis of foreign cells).
  • IgG is the most common type of antibody found in blood circulation. IgG molecules are created and released by plasma B cells. Coating of IgG on pathogen surfaces (known as opsonization) allows their recognition and ingestion by phagocytic immune cells leading to the lysis of foreign cells.
So, the correct answer is 'IgM and IgG'.
Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Antibodies are formed by

  1. T-cells

  2. Monocytes

  3. Phagocytes

  4. B-cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Antibody are produced by B-lymphocytes. The plasma cell /plasma B cells/effector B cell are white blood cells that secrete large volumes of antibodies. Plasma cell originates in the bone marrow.B cell differentiate into a plasma cell that produces antibody molecules. These are transported by the blood plasma and the lymphatic system. Once these are released into the blood and lymph, these antibody molecules bind to the target antigen and initiate its neutralization or destruction.

So, the correct answer is 'B-cells'.

Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Antibodies are complex 

  1. Lipoproteins

  2. Steroids

  3. Prostaglandins

  4. Glycoproteins
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Immunoglobulin also known as antibodies are glycoprotein molecules produced by plasma cells (white blood cells). They act as a critical part of the immune response by specifically recognizing and binding to particular antigens, such as bacteria or viruses and help in their destruction.The antibody immune response is highly complex and exceedingly specific. Hence, antibodies are complex glycoproteins.

So,the correct answer is 'Glycoproteins'.

Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody
Antibodies belong to which class of proteins?

  1. Structural

  2. Transport

  3. Immunoglobulin

  4. Enzymatic
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An antibody which belongs to the class of immunoglobulin is a large, Y-shaped protein which is produced mainly by plasma cells and it is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses. Antibodies are secreted by B lymphocytes of the adaptive immune system, mostly by differentiated B cells called plasma cells. 

So, the correct answer is 'Immunoglobulin'.

Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Immunoglobulins (antibodies) are basically

  1. Lipoproteins

  2. Phospholipids

  3. Glycoproteins

  4. Nucleoproteins
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Immunoglobulins, also known as antibodies, are glycoprotein molecules produced by plasma cells (white blood cells). They act as a critical part of the immune response by specifically recognising and binding to particular antigens, such as bacteria or viruses, and aiding in their destruction. So, the correct option is 'Glycoproteins'

Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Protein released by the host cell in response to attack by a virus is known as 

  1. Antibody

  2. Antigen

  3. Interferon

  4. Immunoglobulin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antibodies (also called immunoglobulins) are large proteins. They are found in the blood or other body fluids of vertebrates. Antibodies are the key element in the adaptive immune system. The antibody recognizes a unique part of the foreign target called an antigen. It is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses. Antibody is produced by plasma cells. Antibodies can occur in two physical forms, a soluble form that is secreted from the cell to be free in the blood plasma, and a membrane-bound form that is attached to the surface of a B cell and is referred to as the B-cell receptor (BCR). 

So the correct option is 'Antibody'

Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Allergens are 

  1. Infectious and increased secretion of IgE

  2. Non- infectious and increased secretions of IgE

  3. Infectious and increased secretion of IgG

  4. Non- infectious and increased secretion of IgM
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction. 
IgE is an immunoglobulin that plays a central role in acute allergic reactions and chronic inflammatory allergic diseases.
Human allergy is caused by a limited number of inhaled small-protein allergens that reproducibly elicit IgE production in susceptible individuals.
So the answer is option B '  Non- infectious and increased secretions of IgE'. 
Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Body's defence system produces antibiotics.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Body's defence system produces antibodies.
  • Antibodies are produced when an allergen or a foreign substance enters the human body by the immune system.
  • It protects the body from unwanted foreign particles which enter the body.
  • So, the correct answer is 'False'.
Multiple choice bio-chemistry diseases and immunity antibodies antibodies and antitoxin antigen and antibody

Which statement is correct?

  1. Antibodies are formed by mast cells

  2. B-lymphocytes are matured in thymus

  3. Histamine acts as inflamatory mediator

  4. CMI is mediated by B-lymphocytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mast cells are coated with IgE, which is produced by plasma cells (the antibody-producing cells of the immune system). IgE antibodies are typically specific to one particular antigen. In allergic reactions, mast cells remain inactive until an allergen binds to IgE already coated upon the cell.

So, the correct option is 'Antibodies are formed by mast cells'.