Tag: diseases and immunity

Quizzes (21) Questions (266)

Questions Related to diseases and immunity

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'.

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

................  is associated with allergic reactions

  1. IgE

  2. IgG

  3. IgA

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

Antibodies are the immunoglobulins which are produced in response to the antigen. The immunoglobulin E antibodies or IgE binds to an allergen and trigger the release of inflammatory chemicals such as histamine.
Therefore, the correct answer is option A.

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

Select the correct statement with respect to diseases and immunisation.

  1. If due to some reason B and T-Lymphocytes are damaged, the body will not produce antibodies against a pathogen.

  2. Injection of dead or inactivated pathogens causes passive immunity.

  3. Certain protozoans have been used to mass produce hepatitis B vaccine.

  4. Injection of snake antivenom against snake bite is an example of active immunisation.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Clone of B-cells is called as plasma cells which produce antibodies. Helper T-cells secrete IL-2 (interleukin-2) which stimulate B cells to produce antibodies. For example iInjection of snake antivenom against snake bite that provides artificially acquired passive immunity. Thus, the correct answer is option A.

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

A substance produced by the host in response to an infection or foreign structure is 

  1. Antigen

  2. Toxin

  3. Hormone

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

An antibody is a type of proteinaceous substance produced by the body's immune system when it detects harmful substances called antigens. Examples of antigens include microorganisms (bacteria, fungi, parasites and viruses) and chemicals. Each type of antibody is unique and defends the body against one specific type of antigen.