would i be able to get yeast from the grocery store and grow them in petri dishes at home? how?
2007-12-17 16:42:25 · 5 answers · asked by Joyous 2 in Science & Mathematics ➔ Biology
you have to buy the active yeast. drop it in your petri dishes with the growing medium. Agar?
For them to stay fresh in the store theyre dried out before being packed. you reactivate them by adding water, you dont need much, and heat. Room temperature should be fine, too much heat will kill them.
2007-12-17 16:49:35 · answer #1 · answered by sius 2 · 0⤊ 0⤋
Mix a little peanut butter into some gelatin and boil it for several minutes (microwave is fine) to sterilize it, then pour it in some little dishes and let it solidify. Make sure to keep it covered tightly or all kinds of fuzzy molds from the air will take over! (Wash your hands well, too). Then rehydrate some bakers yeast from the store in water that has been boiled and cooled to a little less than the temperature of a cup of coffee, and drop onto your little dishes. They should grow great at room temperature - you will know they are yeast because they will smell like rising bread!
If you have ever received a bread starter from a friend that you grow, divide up and give to more friends, what you were doing is growing and propagating the yeast.
2007-12-18 02:17:13 · answer #2 · answered by geneticsnut 2 · 2⤊ 0⤋
Specialised growth medium called Saborard (sp) agar is used to grow yeast in laboratories, as it inhibits bacterial contamination. You could also grow some packet yeast in sugar water in a bottle.
2007-12-18 01:03:28 · answer #3 · answered by Labsci 7 · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Yeast#Growth_and_nutrition
2007-12-18 01:11:27 · answer #4 · answered by divya 4 · 0⤊ 0⤋
yes, brewers yeast.
2007-12-18 00:46:58 · answer #5 · answered by kev_is_in 2 · 0⤊ 1⤋