⭐ Expected / Important Questions

Human Health and Diseases

🏫 CBSEClass 12Biology·39 important questions
Question 4 Β· MCQ
1 Mark

Which of the following paired organs represent the primary lymphoid organs in the human body?

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Question 5 Β· MCQ
1 Mark

Colostrum secreted by the mother during the initial days of lactation provides which type of immunity to the infant?

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Question 7 Β· MCQ
1 Mark

Interferons are proteins secreted by virus-infected cells to protect non-infected cells from:

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Question 13 Β· MCQ
1 Mark

Biological response modifiers like alpha-interferon are given to cancer patients to:

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Question 17 Β· MCQ
1 Mark

The property of normal cells by virtue of which contact with other cells inhibits their uncontrolled growth is known as:

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Question 32 Β· LA
5 Marks

What is immunity? Distinguish between innate immunity and acquired immunity. Briefly explain active and passive immunity with suitable examples, and describe the structure of an antibody molecule.

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Question 33 Β· LA
5 Marks

Describe the complete life cycle of the malarial parasite Plasmodium with neat points. Explain the stages that occur in both the human body and the female Anopheles mosquito.

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Question 34 Β· LA
5 Marks

Describe the life cycle of Plasmodium in the human body and female Anopheles mosquito with a detailed step-by-step breakdown. Also, mention the main symptoms, causative agent, and prevention measures of malaria.

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Question 35 Β· LA
5 Marks

Define Immunity. Differentiate between Innate Immunity and Acquired Immunity. Detail the two types of acquired immune responses (Humoral and Cell-Mediated Immunity) and explain the structural components of an Antibody molecule.

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Question 36 Β· LA
5 Marks

Answer the following regarding AIDS (Acquired Immuno Deficiency Syndrome): (a) Name the causative agent and describe its genetic material. (b) Explain the step-by-step mechanism of HIV infection and replication inside the human host. (c) Name the diagnostic test used for detecting AIDS. (d) Mention preventive measures to control the spread of AIDS.

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Question 37 Β· LA
5 Marks

Define immunity. Distinguish between innate and acquired immunity. Explain the two types of acquired immune responses (humoral and cell-mediated immunity) in detail.

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Question 38 Β· LA
5 Marks

Describe the complete life cycle of the malarial parasite (Plasmodium) in the human host and female Anopheles mosquito. Include the symptoms and preventive measures for malaria.

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Question 39 Β· LA
5 Marks

What is immunity? Explain in detail the two main types of immunity present in the human body: Innate Immunity (including its four barriers) and Acquired Immunity. Also, briefly differentiate between Humoral Immune Response and Cell-Mediated Immunity.

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