Explain why antigen recognition and interaction with activated helper T cells are needed for B-cell activation.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2023–2026.
Proteins contribute to structure, recognition and defence. (a) Outline the general organization of a peptide. (b) Describe the four ABO blood groups and their molecular/genetic basis. (c) Explain the adaptive immune response to invading pathogens.
The model shows an interaction between immune cells, followed by formation of two cell types. What do labels P, Q and R represent? A. P: plasma cell; Q: glucose; R: helper T cell B. P: phagocyte; Q: antibody; R: red blood cell C. P: memory B cell; Q: lipid; R:…
Which event initiates a specific antibody-producing response? A. Activation of a matching B cell by antigen and helper-T-cell signals B. Conversion of fibrinogen into fibrin C. Contraction of a skeletal muscle D. Release of hydrochloric acid in the stomach
What is a major role of a helper T lymphocyte during an adaptive immune response? A. Activating other immune cells through signalling B. Secreting the bulk of circulating antibody directly C. Engulfing every extracellular pathogen by phagocytosis D. Producing…
Consider three defensive responses. I. Formation of a fibrin clot over a wound II. Engulfment of microbes by phagocytes III. Antibody production by activated B lymphocytes Which is an antigen-specific adaptive response? A. I and III only B. I and II only C.…
Consider three defensive responses. I. Formation of a fibrin clot over a wound II. Engulfment of microbes by phagocytes III. Antibody production by activated B lymphocytes Which is an antigen-specific adaptive response? A. I and III only B. I and II only C.…
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