Interactive Biology, by Leslie Samuel » Biology Labs http://www.interactive-biology.com Making Biology Fun! Sun, 05 Feb 2012 08:33:34 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Making Biology Fun! Interactive Biology, by Leslie Samuel no Making Biology Fun! Interactive Biology, by Leslie Samuel » Biology Labs http://www.interactive-biology.com/wp-content/plugins/powerpress/rss_default.jpg http://www.interactive-biology.com/category/biology-1/biology-labs/ Cellular Respiration in Yeast Lab http://www.interactive-biology.com/351/cellular-respiration-in-yeast-lab/ http://www.interactive-biology.com/351/cellular-respiration-in-yeast-lab/#comments Thu, 14 Jan 2010 21:48:11 +0000 Leslie Samuel http://www.leslie-samuel.com/?p=351 This lab explores the concepts of Cellular Respiration and Fermentation in yeast. Yeast do Alcoholic Fermentation and one of the byproducts is Carbon Dioxide. When you bake bread with yeast, Carbon dioxide is produced, which forms bubbles in the dough, causing the dough to rise. The heat kills the yeast and the bubble pockets lighten the bread.

In this lab, you can actually see fermentation happening by measuring “bubble production”. The tricky part of this lab is setting it up. So I put together a little video to show you exactly how to do that. Special thanks to my Student Worker Brian Powers for helping me film the video. He did a pretty good job – Smooth zooming and all. Enjoy!

Video Introduction

Lab Handout

And here’s the actual lab. You can download it by clicking on the download link on the top left of the document. You will need Adobe Acrobat or another pdf viewer in order to download it and see it on your computer.

Sample Results

The following picture was taken approximately 45 minutes after the test tubes were placed in an incubator at 30 degrees Celcius. You can see that there’s CO2 production in both samples with sugar and none in the control (click image to enlarge).

co2

CO2 Production (after 45 minutes)

]]> http://www.interactive-biology.com/351/cellular-respiration-in-yeast-lab/feed/ 4 alcoholic fermentation,ATP production,Cellular Respiration,CO2 production,yeast respiration This lab explores the concepts of Cellular Respiration and Fermentation in yeast. Yeast do Alcoholic Fermentation and one of the byproducts is Carbon Dioxide. When you bake bread with yeast, Carbon dioxide is produced, which forms bubbles in the dough, This lab explores the concepts of Cellular Respiration and Fermentation in yeast. Yeast do Alcoholic Fermentation and one of the byproducts is Carbon Dioxide. When you bake bread with yeast, Carbon dioxide is produced, which forms bubbles in the dough, causing the dough to rise. The heat kills the yeast and the bubble pockets lighten the bread. Interactive Biology, by Leslie Samuel no