AP Bio Chp 11 MC - C h11 Cell Communication - M ultiple...

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Ch11 Cell Communication - Multiple Choice 1. In yeast (Saccharomyces cerevisiae), the two sexes are called b. a and . 2. In the yeast signal transduction pathway, after both types of mating cells have released the mating factors and the factors have bound to specific receptors on the correct cells, a. binding induces changes in the cells that lead to cell fusion. 3. Which of the following is true of the mating signal transduction pathway in yeast? b. Mating type a secretes a signal called a factor. 4. What could happen to the target cells in an animal that lack receptors for local regulators? d. They would not be able to multiply in response to growth factors from nearby cells. 5. Paracrine signaling a. involves secreting cells acting on nearby target cells by discharging a local regulator into the extracellular fluid. 6. Which of the following is true of synaptic signaling and hormonal signaling? b. Hormonal signaling is important between cells that are at greater distances apart than in synaptic signaling. 7. The old saying "one rotten apple spoils the whole barrel" is due to chemical signaling in plants via c. release of ethylene gas, a plant hormone for ripening. 8. From the perspective of the cell receiving the message, the three stages of cell signaling are b. signal reception, signal transduction, and cellular response. 9. The process of transduction usually begins b. when the signal molecule changes the receptor protein in some way. 10. 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 c. paracrine signaling. 11. The signal transduction pathway in animal cells that use epinephrine a. activates the breakdown of glycogen in liver and skeletal muscle cells. 12. A small molecule that specifically binds to another molecule, usually a larger one b. is called a ligand. 13. Which of the following is (are) true of ligand-gated ion channels? e. A, B, and C are true. 14. Of the following, a receptor protein in a membrane that recognizes a chemical signal is most similar to a. the active site of an enzyme in the cytoplasm that binds to a specific substrate. 15.
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AP Bio Chp 11 MC - C h11 Cell Communication - M ultiple...

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