AP Biology Test Revision

AP Biology Test Revision - Cell 02:22 White blood cells...

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Cell 02:22 White blood cells engulf bacteria through what process? Phagocytosis What would be true for the signaling system in an animal cell that lacks the ability to produce GTP? It would not be able to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane Most signal molecules Bind to specific sites on receptor proteins in a membrane Are water-soluble What could happen to the target cells in an animal that lack receptors for local regulators? They would not be able to multiply in response to growth factors from nearby cells From the perspective of the cell receiving the message, the 3 stages of cell signaling are Signal reception, signal transduction and cellular response The process of transduction usually begins When the signal molecule change the receptor protein in some way When a cell releases a signal molecule into the environment and a number of cells in the immediate vicinity respond, this type of signaling is Paracrine signaling A small molecule that specifically binds to another molecule, usually a larger one Is called a ligand Of the following, a receptor protein in a membrane that recognizes a chemical signal is most similar to The active site of an enzyme in the cytoplasm that binds to a specific substrate The ability of a single ligand bound to a receptor protein to trigger several pathways is
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A key difference between the tyrosine-kinase and G-protein-linked receptor systems Which of the following are chemical messengers that pass through the plasma membrane of cells and have receptor molecules in the cytoplasm? Nitric oxide Testosterone In general, a signal transmitted via phosphorylation of a series of proteins Brings a conformational change to each protein Which of the following is widely used 2 nd messenger (water soluble) in signal transduction pathways? Calcium ions Cyclic AMP Inositol trisphosphate Under which of the following conditions would you expect to find a cell with a predominance of free ribosomes?
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This note was uploaded on 01/31/2011 for the course BIO 101 taught by Professor Nil during the Spring '03 term at Hanken.

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AP Biology Test Revision - Cell 02:22 White blood cells...

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