Challenging Inflammation and Histamine MCQs for Class 12 Biology – Test Your Knowledge Now

Challenging Inflammation and Histamine MCQs for Class 12 Biology – Test Your Knowledge Now

Inflammation and Histamine MCQs for Class 12 Biology is an important revision topic for aspirants who want to understand immunity, allergic reactions, tissue injury, mast cells, chemical mediators, and the body’s defence responses in a clear and exam-focused way. Inflammation and Histamine MCQs for Class 12 Biology helps aspirants connect the concepts of innate immunity with visible symptoms such as redness, swelling, heat, pain, and sometimes fever. Inflammation is a protective response of the body against infection, injury, toxins, or irritation, while histamine is one of the major chemicals released during this response. Inflammation and Histamine MCQs for Class 12 Biology is useful because many biology exams test the relationship between mast cells, basophils, histamine release, allergic reactions, and inflammatory symptoms. Aspirants studying Inflammation and Histamine MCQs for Class 12 Biology should remember that inflammation is not always harmful; it is often the body’s attempt to isolate damage, destroy microbes, and begin tissue repair.

Inflammation and Histamine MCQs for Class 12 Biology becomes easier when aspirants first understand the role of histamine. Histamine is released mainly by mast cells and basophils when tissues are injured or when the immune system reacts to allergens. Inflammation and Histamine MCQs for Class 12 Biology explains that histamine causes vasodilation, which means widening of blood vessels, and this results in redness and warmth at the affected site. It also increases vascular permeability, allowing fluid and immune cells to move into the injured area, which causes swelling. Inflammation and Histamine MCQs for Class 12 Biology helps aspirants understand why an insect bite, pollen exposure, dust allergy, or tissue injury may lead to itching, redness, swelling, sneezing, watery eyes, and irritation. Inflammation and Histamine MCQs for Class 12 Biology also links histamine with allergic conditions such as asthma, hay fever, skin rashes, and anaphylaxis.

Aspirants preparing Inflammation and Histamine MCQs for Class 12 Biology should focus on the difference between normal inflammation and allergic hypersensitivity. Normal inflammation protects the body from infection or injury, while allergic hypersensitivity is an exaggerated immune response to harmless substances called allergens. Inflammation and Histamine MCQs for Class 12 Biology teaches that allergens such as pollen, dust mites, animal dander, certain foods, and insect venom can trigger IgE-mediated reactions in sensitive individuals. When IgE antibodies bind to mast cells and the allergen appears again, mast cells release histamine and other mediators. Inflammation and Histamine MCQs for Class 12 Biology helps aspirants understand why antihistamines are used to reduce allergy symptoms. These medicines block the action of histamine and provide relief from sneezing, itching, watery eyes, and running nose.

Inflammation and Histamine MCQs for Class 12 Biology also includes the study of inflammatory cells and immune mediators. Neutrophils, macrophages, mast cells, basophils, lymphocytes, cytokines, prostaglandins, kinins, and complement proteins may participate in inflammatory responses. Inflammation and Histamine MCQs for Class 12 Biology becomes more meaningful when aspirants connect each component with its function. Neutrophils and macrophages destroy microbes by phagocytosis, mast cells release histamine, cytokines coordinate immune communication, and complement proteins help eliminate pathogens. Inflammation and Histamine MCQs for Class 12 Biology also helps aspirants understand that inflammation is part of innate immunity, but it can interact with acquired immunity during stronger immune reactions.

For effective revision, Inflammation and Histamine MCQs for Class 12 Biology should be studied with short notes, flowcharts, and concept maps. Aspirants can prepare a simple sequence: injury or allergen exposure, mast cell activation, histamine release, vasodilation, increased permeability, swelling, redness, pain, and immune cell movement. Inflammation and Histamine MCQs for Class 12 Biology becomes easier when aspirants remember that histamine does not cause immunity by itself; instead, it acts as a chemical messenger that supports inflammatory and allergic responses. Aspirants should also revise the role of antihistamines, steroids, adrenaline, and immune cells in controlling excessive inflammation. Inflammation and Histamine MCQs for Class 12 Biology helps aspirants avoid confusion between allergy, autoimmunity, infection, inflammation, and immunity.

Inflammation and Histamine MCQs for Class 12 Biology is especially important for board exams, NEET, nursing entrance exams, and general biology competitions because it combines direct facts with conceptual understanding. Inflammation and Histamine MCQs for Class 12 Biology encourages aspirants to connect textbook knowledge with real-life conditions such as asthma attacks, seasonal allergy, insect bite swelling, skin irritation, and allergic rhinitis. Aspirants should revise this topic regularly because it connects many key terms from human health and disease, including antigen, allergen, antibody, IgE, mast cell, basophil, histamine, cytokine, inflammation, hypersensitivity, and innate immunity.

Inflammation and Histamine MCQs for Class 12 Biology:

  1. How many variable segments are present in the basic structure of an antibody molecule?

A. One
B. Two
C. Three
D. Four

Answer: D. Four

Explanation: Four variable segments are present in the basic structure of an antibody molecule.

  1. Which of the following best explains the difference between an epitope and an antigen?

A. An epitope is any foreign substance, an antigen is a foreign protein
B. An epitope is the part of an antigen where an antibody or lymphocyte receptor binds
C. An antigen is the part of an epitope where an antibody or lymphocyte receptor binds
D. Antigens are recognized by B-cells and antibodies, epitopes are recognized by T-cells

Answer: B. An epitope is the part of an antigen where an antibody or lymphocyte receptor binds

Explanation: An epitope is the specific part of an antigen that is recognized and bound by an antibody or lymphocyte receptor.

  1. An example of innate immunity is

A. PMNL-neutrophils
B. T-lymphocytes
C. B-lymphocytes
D. TH cells

Answer: A. PMNL-neutrophils

Explanation: PMNL-neutrophils are part of innate immunity and help in the body’s first non-specific defense against pathogens.

  1. Broad spectrum antibiotic:

A. Acts on all bacteria and viruses
B. Is effective in very small amounts
C. Acts on both pathogen and host
D. Acts on a variety of pathogenic microorganisms

Answer: D. Acts on a variety of pathogenic microorganisms

Explanation: Broad spectrum antibiotics act against a wide variety of pathogenic microorganisms.

  1. Which of the following organs can be called a sort of “blood bank”?

A. Heart
B. Spleen
C. Liver
D. Lungs

Answer: B. Spleen

Explanation: The spleen acts as a reservoir of red blood cells and is therefore sometimes called the blood bank of the body.

  1. Reticular tissue forms the supporting framework of

A. Bone marrow
B. Lymph gland
C. Spleen
D. All of these

Answer: D. All of these

Explanation: Reticular tissue forms the supporting framework of bone marrow, lymph glands, spleen, and some other lymphoid organs.

  1. Iron is stored in bone marrow as

A. Haemosiderin
B. Ferritin
C. Haematin
D. None of these

Answer: B. Ferritin

Explanation: Iron is stored in the bone marrow mainly as ferritin, a protein that stores and releases iron in a controlled manner.

  1. Immunodeficiency makes a person highly susceptible to infection. It is caused by:

A. Lack of B cells
B. Lack of T cells
C. Lack of both B and T cells
D. None of the above

Answer: C. Lack of both B and T cells

Explanation: Immunodeficiency may result from deficiency of both B-cells and T-cells, making a person highly susceptible to infections.

  1. One of the inflammatory reactions induced by histamine is

A. Vasoconstriction of blood vessels
B. Vasodilation of peripheral blood vessels
C. Increased vascular permeability
D. Accelerated blood clotting

Answer: B. Vasodilation of peripheral blood vessels

Explanation: Histamine causes vasodilation of peripheral blood vessels during inflammatory reactions.

  1. Antiserum is a serum containing

A. Antigens
B. Leucocytes
C. Antibodies
D. None of these

Answer: C. Antibodies

Explanation: Antiserum is blood serum containing specific antibodies against an infective organism or poisonous substance.

  1. The immune system is made of

A. Humoral system
B. Humoral and cell mediated systems
C. Humoral and fibrous systems
D. Antigen induced antibodies

Answer: B. Humoral and cell mediated systems

Explanation: The immune system includes humoral immunity and cell-mediated immunity, which help defend the body against harmful agents.

  1. Which cell of the immune system causes pore formation at the surface of the plasma membrane?

A. Helper T-cell
B. Killer T-cell
C. Suppressor T-cell
D. B-cell

Answer: B. Killer T-cell

Explanation: Killer T-cells, also called cytotoxic T-cells, release perforins that form pores in the plasma membrane of target cells.

  1. Matching of the following is necessary for a successful organ transplant

A. Rh factor
B. ABO blood group
C. MHC antigens
D. Hypersensitivity

Answer: C. MHC antigens

Explanation: Matching of MHC antigens is important for successful organ transplantation because mismatched MHC molecules can cause graft rejection.

  1. The Adenosine deaminase deficiency results into

A. Addison’s disease
B. Dysfunction of immune system
C. Parkinson’s disease
D. Digestive disorder

Answer: B. Dysfunction of immune system

Explanation: Adenosine deaminase deficiency causes severe combined immunodeficiency, SCID, leading to serious dysfunction of the immune system.

  1. Which of the following is a correct match between the components of the immune system and their functions?

A. Antiserum – Contains antigens
B. Killer T-cell – Causes pore formation at the surface of the plasma membrane
C. Ferritin – Stores iron in bone marrow
D. Humoral immunity – Defends against harmful agents such as bacteria and viruses

Answer: C. Ferritin – Stores iron in bone marrow

Explanation: Ferritin is an intracellular protein that stores iron in tissues including bone marrow.

  1. Which of the following immunoglobulins constitutes the largest percentage in human milk?

A. IgG
B. IgD
C. IgM
D. IgA

Answer: D. IgA

Explanation: IgA is present in external body secretions including colostrum and milk. It forms the major antibody in human milk.

  1. An insect bite may result in inflammation of that spot. This is triggered by alarm chemicals such as:

A. Histamine and dopamine
B. Histamine and kinins
C. Interferons and opsonin
D. Interferons and histones

Answer: B. Histamine and kinins

Explanation: Inflammation caused by an insect bite is triggered by chemicals such as histamine and kinins.

  1. Lysis of foreign cell is mediated through

A. IgM only
B. IgM and IgG
C. IgA only
D. IgD and IgE

Answer: B. IgM and IgG

Explanation: Lysis of foreign cells is mediated mainly through IgM and IgG, often with the help of complement activation.

  1. Which of the following displays immune tolerance?

A. B-cells
B. α-cells
C. T-cells
D. Both A and C

Answer: D. Both A and C

Explanation: Immune tolerance involves unresponsiveness of the immune system toward specific antigens and is shown by both B-cells and T-cells.

  1. Immunity tolerance developed by

A. Interaction with the antigen
B. By giving antibodies
C. Present by birth
D. By giving antibiotics

Answer: A. Interaction with the antigen

Explanation: Immunological tolerance develops due to specific interaction with an antigen, leading to immune unresponsiveness to that antigen.

  1. Minute quantity of hormones and steroid are detected by

A. Electrophoresis
B. Radioimmunoassay
C. Electro encephalogram
D. Fractional analysis

Answer: B. Radioimmunoassay

Explanation: Radioimmunoassay is used to detect minute quantities of hormones, steroids, and other substances using antigen-antibody reactions.

  1. Which enzymes are released from the cytotoxic T-lymphocytes that help in apoptosis?

A. Lysosome
B. Granzymes
C. Nuclease
D. Perforins

Answer: B. Granzymes

Explanation: Granzymes are enzymes released by cytotoxic T-lymphocytes that help induce apoptosis in target cells.

  1. Among the following, which one has high risk of getting HIV infection?

A. Individuals who have multiple sexual partners
B. Drug addicts who take drugs intravenously
C. Individuals who require repeated blood transfusions
D. All of the above

Answer: D. All of the above

Explanation: HIV infection may spread through sexual contact, contaminated blood transfusion, and sharing infected needles.

  1. In AIDS, HIV kills

A. Antibody molecule
B. T-helper cell
C. Bone marrow
D. T-cytotoxic cell

Answer: B. T-helper cell

Explanation: HIV mainly infects and destroys helper T-cells, weakening the immune system.

  1. What is the principal use of ELISA test?

A. Detection of antibodies
B. Detection of viral disease
C. Detection of AIDS
D. Detection of all of these

Answer: D. Detection of all of these

Explanation: ELISA is used to detect antibodies, antigens, and infectious diseases, including AIDS, based on antigen-antibody interactions.

  1. Which tests are used in the diagnosis of AIDS?

A. ELISA and immunoblot
B. Northern blot and ELISA
C. ELISA and southern blot
D. Western blot and ELISA

Answer: D. Western blot and ELISA

Explanation: ELISA and Western blot are commonly used in the diagnosis of AIDS. ELISA detects antibodies, and Western blot confirms specific proteins.

  1. What does AIDS stand for?

A. Acquired Immunodeficiency Syndrome
B. Acquired Immunitydeficiency Syndrome
C. Acquired Immuno Deficient Syndrome
D. Acquired Immunity Deficient Syndrome

Answer: A. Acquired Immunodeficiency Syndrome

Explanation: AIDS stands for Acquired Immunodeficiency Syndrome. It is caused by HIV infection.

  1. What does the AIDS virus contain?

A. RNA with protein
B. DNA with protein
C. DNA without protein
D. DNA only

Answer: A. RNA with protein

Explanation: HIV is a retrovirus. It contains RNA as genetic material along with proteins, including reverse transcriptase.

  1. When was AIDS disease first reported?

A. Russia
B. Germany
C. USA
D. France

Answer: C. USA

Explanation: AIDS was first reported in the USA in 1981 and later spread worldwide.

  1. What causes AIDS?

A. Retrovirus
B. DNA virus
C. Viroid
D. Protein

Answer: A. Retrovirus

Explanation: AIDS is caused by HIV, a retrovirus with RNA as its genetic material.

Inflammation and Histamine MCQs for Class 12 Biology

 

Conclusion on Inflammation and Histamine MCQs for Class 12 Biology

In conclusion, Inflammation and Histamine MCQs for Class 12 Biology is a valuable topic for aspirants who want to master immunity-related concepts in a simple and organised way. Inflammation and Histamine MCQs for Class 12 Biology improves understanding of histamine release, mast cell activation, allergic reactions, inflammatory symptoms, antihistamines, immune cells, and body defence mechanisms. Overall, Inflammation and Histamine MCQs for Class 12 Biology supports better revision and stronger concept clarity. With consistent revision, aspirants can answer related biology questions with better speed, clarity, and confidence.

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