Cellular Respiration Ex 8
Cellular respiration
• Break bonds in nutrients to form ATP
• Where does it occur
In eukaryotic cells?
Mitochondria
Overall reaction is aerobic
Glucose + Oxygen  Carbon dioxide + Water
Net 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
See handout
Assignment 7
Hypothesis: Fermentation of glucose, sucrose,
and starch by yeast occurs at the same rate
Yeast producing CO2
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
What is the
dependent variable?
Bromthymol blue + CO2  yellow color
Cellular respiration
Glucose + Oxygen  Carbon dioxide + water
Net 36 ATP
Experiment 2
Hypotheses: 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