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Punjab (PTB) · Chapter test · Free

2nd Year Biology Chapter 9 TestIMMUNITY

30 marks · 40 minutes · 21 questions. Covers: CHAP 21: IMMUNITY.

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2nd Year Biology Chapter 9 Test

2nd Year · Biology · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. Macrophages ingest a bacterium by which cellular process?

    1. Exocytosis

    2. Endocytosis

    3. Diffusion

    4. Osmosis

  2. Secreted B receptor proteins that circulate freely in the body are called:

    1. Antibodies

    2. Antigens

    3. Cytokines

    4. Histamines

  3. What specific proteins do Natural Killer Cells release to create pores in an infected target cell's membrane?

    1. Interferons

    2. Perforins

    3. Antibodies

    4. Histamines

  4. Which inflammatory chemical substance is released by mast cells to cause allergy symptoms?

    1. Insulin

    2. Pepsin

    3. Perforins

    4. Histamines

  5. In Myasthenia gravis (MG), patients produce antibodies against which specific receptors on their skeletal muscle cells?

    1. Acetylcholine receptors

    2. Insulin receptors

    3. Histamine receptors

    4. Hormone receptors

  6. Neutrophils can generate a trapping network made out of which specific fibers?

    1. Keratin fibers

    2. Collagen fibers

    3. Protein fibers

    4. DNA fibers

  7. When a B cell encounters an antigen, it divides into many new cells called:

    1. Macrophages

    2. Plasma cells

    3. Inducer cells

    4. Cytotoxic cells

  8. Which protective antiviral protein was successfully purified using monoclonal antibodies?

    1. Insulin

    2. Interferon

    3. Growth hormone

    4. Hemoglobin

  9. The third line of defence is also called:

    1. Non-specific defence

    2. Innate immunity

    3. Specific defence

    4. Inborn immunity

  10. Skin offers an impenetrable barrier to microbes. It is categorized as:

    1. Non-specific defence

    2. Specific defence

    3. Acquired immunity

    4. Passive Immunity

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. Define Natural Active Immunity.

  2. What is the primary drawback of using general immunosuppressive drugs to treat autoimmune diseases or transplant rejection?

  3. How does Active Immunity differ from Passive Immunity?

  4. Differentiate between the constant region and the variable region of an antibody.

  5. What is the role of lysozyme in sweat and saliva?

  6. Define an antigen determinant.

  7. How do perforins cause an infected target cell to burst?

  8. Give an example of a misdirected immune response involving inflammation.

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. How are monocytes, T-cells and B-cells the components of the immune system?

  2. Define allergies. Correlate the symptoms of allergies with the release of histamines.

  3. Rationalize the inflammatory response in arthritis as an example of a misdirected immune response.