Biology

Human Immunity and Blood

2,051 Questions

Human immunity and blood questions cover the physiological mechanisms protecting the body against diseases and the components of blood. Topics include blood groups, cell mediated immunity, monoclonal antibodies, and blood coagulation. These biology topics frequently appear in general science sections of competitive exams.

Blood groupsCell mediated immunityMonoclonal antibodiesBlood coagulationCancer immunology

Human Immunity and Blood Questions

Multiple choice

Which of the following is NOT a type of cytokine?

  1. Interleukin-1

  2. Interleukin-2

  3. Interleukin-6

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

Interferon is not a type of cytokine. It is a type of protein that is produced by cells in response to viral infection.

Multiple choice

Which of the following is NOT a component of the complement system?

  1. C3

  2. C4

  3. C5

  4. C6
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

C6 is not a component of the complement system. It is a component of the coagulation cascade.

Multiple choice

What is the term for a severe allergic reaction that can be life-threatening?

  1. Anaphylaxis

  2. Asthma attack

  3. Hay fever

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

Anaphylaxis is a severe allergic reaction that can be life-threatening and requires immediate medical attention.

Multiple choice

Which of the following is not a type of white blood cell?

  1. Neutrophils

  2. Lymphocytes

  3. Platelets

  4. Eosinophils
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Platelets are not white blood cells, they are involved in blood clotting.

Multiple choice

Which type of lymphocyte is responsible for producing antibodies?

  1. T cells

  2. B cells

  3. Natural killer cells

  4. Dendritic cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

B cells are responsible for producing antibodies, which are proteins that recognize and bind to specific antigens.

Multiple choice

Which type of cell is responsible for presenting antigens to T cells?

  1. Neutrophils

  2. Lymphocytes

  3. Dendritic cells

  4. Macrophages
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dendritic cells are antigen-presenting cells that capture and process antigens and present them to T cells.

Multiple choice

Which type of cell is responsible for regulating the immune response?

  1. T cells

  2. B cells

  3. Natural killer cells

  4. Regulatory T cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Regulatory T cells are a type of T cell that helps to control the immune response and prevent autoimmune diseases.

Multiple choice

Which type of cell is responsible for producing memory cells?

  1. T cells

  2. B cells

  3. Natural killer cells

  4. Dendritic cells
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Both T cells and B cells can produce memory cells, which are long-lived cells that can quickly respond to a previously encountered antigen.

Multiple choice

Which type of cell is responsible for producing interferon?

  1. T cells

  2. B cells

  3. Natural killer cells

  4. Dendritic cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Natural killer cells produce interferon, which is a cytokine that helps to fight viral infections.

Multiple choice

Which type of cell is responsible for producing interleukin-2?

  1. T cells

  2. B cells

  3. Natural killer cells

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

T cells produce interleukin-2, which is a cytokine that helps to activate other immune cells.

Multiple choice

Which type of cell is responsible for producing tumor necrosis factor?

  1. T cells

  2. B cells

  3. Natural killer cells

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

Macrophages produce tumor necrosis factor, which is a cytokine that helps to kill tumor cells.

Multiple choice

What is the role of T cells in the immune system?

  1. To produce antibodies

  2. To destroy infected cells

  3. To activate complement proteins

  4. To help B cells differentiate into plasma cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

T cells are a type of white blood cell that plays a crucial role in the immune system. They are responsible for recognizing and destroying infected cells, as well as helping B cells differentiate into plasma cells, which produce antibodies.

Multiple choice

Which type of T cell is responsible for killing infected cells?

  1. Helper T cells

  2. Regulatory T cells

  3. Cytotoxic T cells

  4. Memory T cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cytotoxic T cells, also known as killer T cells, are a type of T cell that is responsible for killing infected cells. They recognize and bind to infected cells, releasing toxic substances that destroy the cells.

Multiple choice

Which type of immune response is mediated by T cells?

  1. Humoral immunity

  2. Cell-mediated immunity

  3. Innate immunity

  4. Adaptive immunity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cell-mediated immunity is the T cell-mediated immune response. It involves the activation of T cells, which recognize and destroy infected cells, as well as helping B cells differentiate into plasma cells, which produce antibodies.

Multiple choice

What is the role of the complement system in the immune system?

  1. To produce antibodies

  2. To destroy infected cells

  3. To activate complement proteins

  4. To help B cells differentiate into plasma cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The complement system is a complex network of proteins that plays a crucial role in the immune system. It is activated by the presence of an antigen and helps in the destruction of infected cells, as well as the activation of other immune cells.