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)the cells then produce the a factor and the α factor.
C)one cell nucleus binds the mating factors and produces a new nucleus in the opposite cell.
D)the cell membranes fall apart, releasing the mating factors that lead to new yeast cells.
E)a growth factor is secreted that stimulates mitosis in both cells.

Question

Quizplus · Accepted Answer

Binding of the mating factors to specific receptors on the correct cells triggers a cascade of events in the yeast signal transduction pathway that leads to cell fusion. This fusion of two haploid cells results in the formation of a diploid zygote, which can then undergo meiosis to form four new haploid yeast cells. Production of the a factor and α factor and nucleus formation do occur during the mating process, but they are not directly related to the signal transduction pathway that leads to cell fusion. Neither the cell membranes falling apart nor the secretion of a growth factor that stimulates mitosis are accurate descriptions of the yeast mating process.

In the Yeast Signal Transduction Pathway, After Both Types of Mating