10. NK cells recognize and kill abnormal host cells that are: A. opsonized with IgE. B. lacking expression of MHC class I C. expressing MHC class I. D. presenting antigen bound to MHC class II.

Q: 8. Which statement is incorrect? a. IgG is the most abundant antibody in blood b. Antibodies can…

A: Antibodies play a key role in the immune responses against foreign bodies such as pathogenic…

Q: vaccination provides natural passive immunity A. True B. False 1e. Lymph nodes have several…

A: Answer 1a Toxoids and vaccine function similarly  True this statement is correct.  Answer 1b Active…

Q: 9. Which of the following antibody classes or isotypes facilitate the sequential binding of the C1,…

A: Antibodies are also known as immunoglobulin.These are the protein which are made by plasma cell .…

Q: 6. What process generates the millions of different antigen receptors found on B and T cells?

A: Both B cells and T cells have millions of different antigens, the data for which is too much to be…

Q: 16. Which cell type is derived from myeloid progenitors? A). Tc cell B). TH cell C). B cell D). Mast…

A: The development of blood cells starts with stem cells, which are unspecialized cells that can give…

Q: 11. What happens when B cells proliferate in response to signaling from a helper T cell?

A: We know that B cells synthesize and secrete antibodies whereas T-cells do not make antibodies .…

Q: 7. Which of the following is more effective against bacteria than viruses? A. Type 1 Interferon B.…

A: Humoral immunity is the component of immunity that is controlled by extracellular fluid-based…

Q: 4. Both the constant domains and variable domains of immunoglobulins are formed by beta-barrels. For…

A: Beta-Barrels in Immunoglobulins:a. Interaction between Heavy and Light Chain Barrels: The constant…

Q: 6. The C1 complement protein is activated when it binds to the A. Fc region of an antigen-bound…

A: Complements are a group of thermo labile enzymetic proteins found in the serum and body fluids and…

Q: 30. A nursing baby: a. Lacks innate immunity  b. Lacks antimicrobial related immunity  c. Lacks…

A: In humans, the period of gestation or pregnancy is 280 days. During this period, the fetus develops…

Q: 16. Expression of CD25 and CTLA-4 is a characteristic of? A. TH1 B. TH2 Treg

A: CD25 is a protein marker for CD4+ thymocytes. It hs actually the α-chain of the IL-2 receptor. CTLA4…

Q: 5. Which of the following statements about neutrophils is correct? I. II. A. B. C. D. E. III. They…

A: White blood cells known as neutrophils, or leukocytes, serve as the first line of defence for your…

Q: 6. In a healthy person, which of the following cells is the most numerous innate immune cells in the…

A: The most numerous and crucial biological component of the innate immune response is the neutrophil,…

Q: 1. Compare and contrast MHC I and MHC II

A: Major Histocompatibility Complex (MHC): MHC stands for Major Histocompatibility Complex, which is a…

Q: The INNATE defenses can tell the difference between SELF and NONSELF to a certain extent. EXPLAIN…

A: The ability of an organisms to resist a particular infection or toxin by the action of specific…

Q: 10. A given B cell expresses only maternally or paternally derived heavy chains but never both. This…

A: Immunity is a phenomenon build up inside the body of an organism to fight against disease and…

Q: B cells are most important in the _______ immunity type of _______ immunity.

A: Immunity is the resistance to disease. The two important components of immunity are innate and…

Q: A single antigen molecule contains multiple ________

A: The antigens are molecules/proteins that are present on the surface of a micro-organism. Certain…

Q: Dysfunctional repair of DNA double strand breaks often results in SCID because: thoose all that…

A: SCID stands for severe combined immunodeficiency disease.SCID is caused by adenosine deaminase (ADA)…

Q: 2. B cells proliferate and differentiate into plasma cells and memory cells in the secondary…

A: Introduction :- Differentiated B-lymphocyte white blood cells called plasma cells are able to…

Q: B cells are most important in the immunity type ofi mmunity. .A.Cellular; specific B.Cellular;…

A: We know that immunity is resistance to disease. The two important components of immunity are innate…

Q: 2. The following is false about the junctional diversity of antibodies? A. insertion of none-coded…

A: V(D)J recombination is the type of somatic recombination in immune cells like lymphocytes. This is…

Q: 4. Which of the following statements about antibodies is incorrect? A. Antibodies are secreted by…

A: Antibodies are the protein substances secreted from specialised cells called B cells. These…

Q: Describe the importance of T-cells for good health. Key terms: MHC, activation, apoptosis,…

A: T-cells are a type of white blood cells. They are part of the immune system and develop from stem…

Q: 7. Of the millions of antigen receptors, how many types would be found on a single B or T cell?

A: Answer : B and T cells are mainly the cells used in the immune system of the body.  They are…

Q: True or False: The class switch recombination of IgA antibodies is induced by TGF-beta or IL-21, and…

A: 3)It is a false statement.The IgA antibodies switching is done by T cell independent antigens and…

Q: 3. Helper T cells can be activated by I. interacting with an infected cell expressing an antigen-MHC…

A: Introduction Antigen-presenting white blood cells (WBC), such as macrophages (a large phagocytic…

Q: 24. Phagocytes a. Engulf and ingest foreign material b.) Are also known as T lymphocytes C. Are not…

A: Organs, cells, and chemicals make up the immune system, which works collectively to fight pathogens.…

Q: 13. As a response to viral-infected cells, the following cell gets activated? A. TH1 B. TH2 C. TH3…

A: Introduction  A host is required for the growth of viruses, which are microscopic infectious…

Q: 7. Which are important in nonspecific immune defenses? a. interferons b. lymphocyte activation c.…

A: The immune system is an organ system of the body that is functionally responsible for protecting the…

Q: 11. B cells are most important in the _______ immunity type of _______ immunity. .A.Cellular;…

A: Immunity is the resistance to disease. The two important components of immunity are innate and…

Q: 10. Injecting antibodies from a human donor who is immune to a disease is ... A. natural active…

A: Immune system is responsible for giving protection against foreign pathogenic organisms. White blood…

Q: What type of T cell helps an organism mount a rapid immune response if it is secondarily infected…

A: The T-lymphocytes or T-cells are differentiated from bone marrow but they get matured in the thymus…

Q: 25. which of the follwoing are antigen-presenting cells a. mast cells, dendritic cells, and B cells…

A: Antigen-presenting cells (APCs) are a heterogeneous group of immune cells. They mediate the cellular…

Q: phagocytes?

A: Phagocytes: Phagocytes are a type of immune cells which surround and kill microorganisms. They…

Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.