Country: United States
Date: February 2009
I set up the labs for our high school science dept. When
studying cell diversity, students observe yeast cells on slides and must
answer the question, "how do yeast cells move?" The teachers are evenly
split between the answers of "they don't" and "we've never seen them
move". 1. If yeast cells mate, don't they need to have some motility? 2.
How should I prepare a yeast solution so the students would have the
most success of seeing this process?
Yeast cells don't have to be motile to contact each other. They move passively by
means of "currents" in the water caused by temperature differences and random
thermal motion (diffusion).
Ron Baker, Ph.D.
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Update: June 2012