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Biology Scientific Investigation – Yeast Respiration

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Scott Stenning 11W Biology Scientific Investigation - Yeast Respiration Obtaining Evidence Temperature (oC) Results 1 Results 2 Results 3 Average 20 2 2 2 2 25 2 2 2 2 30 2.8 3 2 2.6 35 5.9 3 3 3 40 4 4 5 4.3 50 6.5 6.5 5.5 6.2 60 7.2 6.9 7 7.1 70 9 5 3 80 1 0 0 My results table is different to what I planned. ...read more.


This Is because I realised that I need a wider range of results, so I chose to go above 60 oC and below 30oC. The reason I went up 80oC was to prove that the enzymes denature. ...read more.


A stopwatch was used to measure the time accurately to a 10th of a second. I used a measuring cylinder to count volume to the nearest cm3 . This made it more accurate than counting bubbles, as they are different volumes. This was about as accurate as I could possibly get it. ...read more.

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