Factors that can affect the respiration rates of yeast:Glucose concentration, however it may only be up to a certain point. The site that I have cited for example only went up to 10% glucose concentration however up to that point it did increase the rate of respiration. (Markedbyteachers.
com, 2018) The Temperature, yeast can withstand both freezing cold and scolding heat however the enzymes involved in respiration may denature or be very slow to work at either extremes so a regular temperature is advised. (Actforlibraries.org, 2018) Around 42 degrees Celsius is the optimum temperature for yeast respiration. (Topics, Sample Papers & Articles Online for Free, 2018)PH,