Notch is a receptor protein displayed on the surface of certain cells in developing fruit fly embryos. Notch's ligand is a membrane-bound protein called Delta that is displayed on the surface of adjacent cells, When Notch is activated by its ligand, the intracellular tail of the Notch protein becomes separated from the rest of the protein. This allows the intracellular tail to move to the cell's nucleus and alter the expression of specific genes. Which of the following statements best explains Delta's role in regulating cell communication through the Notch signaling pathway? (A) Delta transmits a chemical signal to all the cells of a developing embryo. (B) Delta allows the cells of a developing embryo to communicate without making direct contact. (C) Delta restricts cell communication to short distances within a developing embryo. (D) Delta determines which cells in a developing embryo express the gene that encodes the Notch protein.
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Biology, 22.06.2019 09:00, risaroo070618
What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.
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Biology, 22.06.2019 14:30, sssssaaaaaddddd7485
Which of the following is the function of the nociceptors? a. detecting odors in the nose b. detecting painful stimuli c. detecting central body temperature d. detecting touch and pressure
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Notch is a receptor protein displayed on the surface of certain cells in developing fruit fly embryo...
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