Bio U9: Cellular Respiration

Cellular Respiration basics + Fermentation

What is the equation for cellular respiration?

C6H12O6 + 6O2 → 6CO2 + 6H2O

What does C6H12O6 + 6O2 → 6CO2 + 6H2O translate to? (What does it represent?)

Glucose + Oxygen → Carbon Dioxide + Water + ATP

What is the first step of cellular respiration?

glycolysis

Where does glycolysis take place in the cell?

cytoplasm

What happens in glycolysis?

hint: glucose is broken down into two _____ molecules and two _____ molecules

glucose is broken down into two molecules of pyruvic acid and two NADH molecules

What is the second step of cellular respiration?

Krebs cycle

Where does the Krebs cycle take place?

mitochondria

In the Krebs cycle, all living things

produce energy in (aerobic/anaerobic) respiration?

aerobic

The Krebs cycle uses ____ and turns it into ____ and _____.

oxygen, water, carbon dioxide

How many ATP does glycolysis produce?

2

How many ATP does the Krebs cycle produce?

2

What is the third step of cellular respiration?

ETC (Electron Transport Chain)

Where does ETC take place?

in the membrane of the mitochondria

How many ATP are produced through ETC?

32

In ETC, electrons travel across the _______, which allows ADP to gain a phosphorus and become ATP.

electrochemical gradient

How many total ATP are produced from cellular respiration?

36

What is the purpose of cellular respiration?

to make ATP

What organic molecule is broken down in cellular respiration?

glucose

What is making ATP without oxygen called?

fermentation

which is more efficient, cellular respiration or fermentation?

cellular respiration

Does fermentation use the citric acid (Krebs) cycle?

no, because the citric acid cycle needs oxygen

What are the two types of fermentation?

Alcohol fermentation and Lactic Acid fermentation

What is the final product of alcohol fermentation?

2 ethanol

Which type of fermentation decarboxylates?

alcohol fermentation

What is the final product of lactic acid fermentation?

2 lactate

ToF: carbon dioxide is released in the lactic acid fermentation process.

false