Lesson: Cellular Respiration

Warm Ups / Content & Presentations / Independent Assignments & Activities / Labs & Group Activities

Warm Ups

Cellular Respiration - review the processes of cellular respiration #content #criticalthinking

Backwards and Forwards - examine the interrelationship between the processes of photosynthesis and cellular respiration#content #criticalthinking

Glycolysis - review the specific steps of the process of splitting glucose and releasing the initial 2 ATP and 2 NADH. (This is best used if time has led to only part of the lesson being taught on the initial day of instruction.) #content #criticalthinking

Content & Presentations

Notes

Presentations

Handout - Cellular Respiration (plan book - find and convert file!)

Glycolysis - Glucose initially broken down in cytoplasm, releasing 2 ATP and some other energy rich molecules

Aerobic Respiration - oxidizing reactions within mitochondria produce approximately 36 ATP

Anaerobic Respiration - (lactic acid/alcoholic) - yields only 2 ATP

#content #criticalthinking

Independent Assignments & Activities

Lab & Group Activities

Demonstration - Baking Bread

Students are shown the process of bread baking. Four simple ingredients (water, yeast, flour and salt) are mixed, kneaded, allowed to rise, shaped into loaves, baked and eaten.

Yum.

#community #collaboration

Yeast and Anaerobic Respiration

Obj: Qualitative (and quantitative) analysis of carbon dioxide production of yeast when mixed with a variety of substances and water (both warm and cool)

Materials: Yeast, substances - sugar, brown sugar, flour,...) measuring spoons, graduated cylinders, ziplock bags, test tubes, beakers, stoppers with holes

Methods: mix 1/4 teaspoon yeast with teaspoon of substance, add water and mix again. Place in ziplock bag and get rid of air. Wait.

Analysis: examine bags for bubbles, compare size of bubbles to determine comparative rates of gas production.

Mix in test tube, fill completely and invert in beaker of water of similar temperature. As gas is produced it will collect in the tube, while water will be forced out of holes in stopper. Make sure to mark starting volume of gas!