OCR GATEWAY b6 0.0 / 5 ? BiologyBiotechnology and the use of microbes in industryGCSENone Created by: HollyKillickCreated on: 06-05-16 12:54 What is it called when yeast respires anaerobically? Fermentation. 1 of 8 Word equation for fermentation. Glucose -> ethanol + carbon dioxide (+ energy) 2 of 8 How does the temperature affect the growth rate of yeast? Yeast produces faster when it's warmer (growth rates double for every 10*c riseuntill optimum temp is reached) If too hot, then yeast dies. 3 of 8 How does glucose affect the growth rate of yeast? More food (glucose), the faster the yeast reproduces. 4 of 8 How do waste products affect the growth rate of yeast? A build up of waste product (ethanol) eventually kills the yeast, slowing down the growth rate. 5 of 8 How does the pH affect the growth rate of yeast? Has to be around the optimum pH of 7, a lower or higher pH will stop the enzymes on the yeast from working. 6 of 8 How does the addition of oxygen change the respiration of yeast? Releases more energy, reproduces faster when respiring aerobically. 7 of 8 How can waste water be cleaned with yeast? To get rid of sugary water 8 of 8
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