Cellular Respiration Ex 8

Cellular respiration

• Break bonds in nutrients to form ATP • Where does it occurIn eukaryotic cells?

Mitochondria

Overall reaction is aerobic

Glucose + Oxygen Carbon dioxide + WaterNet 36 ATP

Fermentation

• An alternative to cellular respiration in some cells, produces 2 ATP/glucose only

• Glucose CO2 + ethanol + 2 ATP

CO2 production as a measure of fermentation

Assignment 7Hypothesis: Fermentation of glucose, sucrose, and starch by yeast occurs at the same rate

Yeast producing CO2

See handout

CELLULAR RESPIRATION

Assignment 2:Hypotheses: Living organisms do not produce CO2

Experiment 1 air exhaled from lungs vs room air

CO2 production as a measure of cellular respiration

Colorimetric test

Bromthymol blue + CO2 yellow color

Cellular respirationGlucose + Oxygen Carbon dioxide + water Net 36 ATP

What is the dependent variable?

Experiment 2Hypotheses: Living organisms do not produce CO2

Plant vs animal

What is the independent variable?

Assignment 3: Hypothesis: Carbon dioxide does not accumulate in

photosynthesizing cells

Plants in light vs dark