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New Microsoft Word Document (2) - 1 In yeast(Saccharomyces...

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1) In yeast (Saccharomyces cerevisiae), the two sexes are called A) b and beta. B) a and alpha. C) a and b. D) S plus and S minus. E) male and female. 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. B) one cell nucleus binds the mating factors and produces a new nucleus in the opposite cell. C) the cells then produce the a factor and the alpha factor. D) the cell membranes fall apart, releasing the mating factors that lead to new yeast cells. 3) Which of the following is true of the mating signal-transduction pathway in yeast? 4) Which of the following responses would be expected in myxobacteria when nutrients are scarce? 5) What could happen to target cells in an animal that lack receptors for local regulators? 6) Paracrine signaling A) involves secreting cells acting on nearby target cells by discharging a local regulator into the extracellular fluid. B) involves mating factors attaching to target cells and causing production of new paracrine cells.
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C) requires nerve cells to release a neurotransmitter into synapse. D) has been found in plants but not animals. E) occurs only in paracrine yeast cells.
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