4.3 Cellular Respiration

Question 1

order of stages in cellular respiration

Answer 1

(First to last) glycolysis, link reaction, krebs cycle, electron transport chain

Question 2

inputs and outputs of each stage

Answer 2

Glycolysis: glucose and ATP -> pyruvate, ATP, NADH
Link Reaction: pyruvate -> acetyl COA, CO2, NADH
Krebs Cycle: Acetyl COA -> ATP, CO2, NADH, FADH
ETC: Oxygen, electrons, protons -> ATP (25ish-30ish) and water

Question 3

location of each stage

Answer 3

Glycolysis: cytoplasm
Link Reaction: mitochondria
Krebs Cycle: mitochondria
ETC: inner membrane of mitochondria

Question 4

overall chemical equation for cellular respiration

Answer 4

C6H12O6 + 6O2 –> 6CO2 +6 H2O + ATP

Question 5

Compare and contrast what happens in your cells to generate ATP when you have oxygen vs. no oxygen

Answer 5

When there is oxygen, glycolysis can continue normally which lets the entire cellular respiration system continue normally. When there is no oxygen, glycolysis goes into fermentation which produces lactic acid which then turns into pyruvate which goes back into glycolisis. This cycle continues until oxygen is present.