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Dec 7, 2023 · Cell Recognition. Our bodies have several defence mechanisms against pathogens. These include: Preventing the entry of pathogens by a variety of physical and chemical defences, such as the skin, mucous membranes, tears (containing the enzyme lysozyme, which destroys bacteria) and saliva.
Mar 13, 2021 · Recognition sequence: specific sequence of DNA bases at which restriction enzymes can act. Recombinant DNA: DNA molecule with more than one source for the DNA. Recombinant offspring: offspring with a different combination of alleles from either of its parents.
Jan 19, 2021 · Cell recognition is one of the ways by which cell s communicate with one another. It is possible through specific cellular adhesion molecule s on the surface of the cell. Examples are: Integrin (LFA-1) of T cell binding to ICAM of endothelial cell.
Cell recognition is the process by which cells identify and communicate with one another. It involves the recognition of specific molecules on the surface of cells, which can trigger various cellular responses such as adhesion, signaling, and immune responses.
What is an antigen? Cell-surface molecule which stimulate immune response. Usually (glyco)protein, sometimes (glyco)lipid or polysaccharide. Immune system recognises as “self” or “non-self” = enables identification of cells from other organisms of same species, pathogens, toxins & abnormal body cells. How does phagocytosis destroy pathogens?
Sep 10, 2024 · Revision notes on Key Terms in Genetics for the Edexcel IGCSE Biology syllabus, written by the Biology experts at Save My Exams.
Test. The structure and function of the nervous system. The conditions inside our body must be carefully controlled if the body is to function effectively. The conditions are controlled in two...
