Respiration Flashcards
(17 cards)
What is respiration?
The process by which energy is released from food (usually glucose) in cells.
What is the word equation for aerobic respiration?
Glucose + Oxygen → Carbon dioxide + Water + Energy
Where does aerobic respiration occur in the cell?
In the inner mitochondria
What is anaerobic respiration?
Respiration without oxygen, producing less energy.
What is the word equation for anaerobic respiration in muscles?
Glucose → Lactic acid + Energy
What is the main disadvantage of anaerobic respiration?
It produces lactic acid, which causes muscle fatigue.
What is oxygen debt?
The amount of oxygen needed to break down lactic acid after anaerobic respiration.
What is ATP?
ATP (adenosine triphosphate) is the energy currency of the cell.
How is energy released from ATP?
By breaking the bond between the second and third phosphate groups (ATP → ADP + Pi).
Where does glycolysis occur?
In the cytoplasm of the cell.
What is the starting molecule for glycolysis?
Glucose (6-carbon sugar).
What are the end products of glycolysis?
2 pyruvate, 2 ATP (net gain), and 2 NADH
Where does the link reaction take place?
In the mitochondrial matrix.
What happens to pyruvate during the link reaction?
It is converted into acetyl CoA, releasing CO₂ and producing NADH.
Where does the Krebs cycle occur?
In the mitochondrial matrix.
What are the products of one turn of the Krebs cycle?
1 ATP, 3 NADH, 1 FADH₂, and 2 CO₂.
What is the main purpose of the Krebs cycle?
To produce high-energy electron carriers (NADH and FADH₂) for the electron transport chain.
