Respiration
Respiration
The problem for this lab is as Deloach stated, if little or no oxygen is present, then the cell moves into anaerobic respiration.(2)
Anaerobic respiration is a process, where if little or no oxygen is present, the cell moves into this process, which produces small amounts of ATP and certain reactants that are needed for aerobic respiration as stated by Deloach.(2) Deloach also stated that anaerobic respiration is a “substitute” until enough oxygen is present, therefore it does not produce near enough energy as aerobic respiration. Deloach stated that glycolysis is the first stage of respiration.(1)
All three experiments showed evidence of anaerobic respiration. The wine and rolls both had the smell of alcohol, which was the alcoholic pathway taking place. The milk turned sour and solid, and also had a bit of color change due to lactic acid fermentation.
The bubbles formed due to the CO2 present in the bread and the wine. The smell in the bred and wine was the alcohol leaving the products due to alcoholic fermentation. The reason the milk changed was as Deloach stated that bacteria found naturally in milk, carries on anaerobic respiration which produces lactic acid, changing the proteins in the milk. This is why the milk turned solid. Butter composition states that butter is the fat of milk. While the butter sat it allowed the solid to separate from the liquid, the solid was then churned to butter.
I. References
A. Deloach, Joe. “Biology Notes”. Gatewood Schools, Inc., Eatonton. 2nd February, 2008
B. Hopson, Janet L. Postlethwait, John H. Modern Biology. Texas, Holt, Reinhart and Winston 2008
C. Webexhibits.org/butter/composition.html
Please login to view the full essay...