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Human Health and Disease MCQs
Class XII Biology
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NCERT Based
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NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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446 questions in this chapter
Question 361 of 446
📘 CLASS XII
A preparation of antigenic proteins of a pathogen or inactivated/weakened pathogen introduced into the body is called a ____.
In vaccination, a preparation of antigenic proteins of pathogen or inactivated/weakened pathogen (vaccine) are introduced.
Question 362 of 446
📘 CLASS XII
The antibodies produced in response to allergens are of the ____ type.
The antibodies produced to allergens are of IgE type.
Question 363 of 446
📘 CLASS XII
Allergies are due to the release of chemicals like histamine and serotonin from the ____ cells.
Allergy is due to the release of chemicals like histamine and serotonin from the mast cells.
Question 364 of 446
📘 CLASS XII
The phenomenon where the body attacks self-cells due to genetic or unknown reasons is called ____ disease.
The body attacks self-cells, resulting in damage, which is called auto-immune disease.
Question 365 of 446
📘 CLASS XII
The bone marrow and thymus provide micro-environments for the development and maturation of ____-lymphocytes.
Both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes.
Question 366 of 446
📘 CLASS XII
Secondary lymphoid organs like the spleen, lymph nodes, and tonsils provide the sites for interaction of lymphocytes with the ____.
The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen.
Question 367 of 446
📘 CLASS XII
AIDS was first reported in the year ____.
AIDS was first reported in 1981.
Question 368 of 446
📘 CLASS XII
HIV is transmitted from an infected mother to her child through the ____.
HIV is transmitted from infected mother to her child through placenta.
Question 369 of 446
📘 CLASS XII
Individuals who have ____ sexual partners are considered at high risk of getting HIV infection.
Individuals who have multiple sexual partners are at high risk of getting HIV infection.
Question 370 of 446
📘 CLASS XII
HIV enters into ____ where its RNA genome replicates to form viral DNA.
The virus enters into macrophages where RNA genome replicates to form viral DNA.
