Respiration Flashcards
What are the two major categories of reactions?
- Catabolic
- Anabolic
What is a catabolic reaction?
It is the breakdown of a larger molecule into smaller molecules, usually accompanied with the release of energy
Give an example of a catabolic reaction
Respiration
What is an anabolic reaction?
The conversion of smaller molecules into larger molecules
Give an example of an anabolic reaction
Photosynthesis
Where does glycolysis occur?
In the cytoplasm
What is the major product of glycolysis?
2 x pyruvate molecules
Does glycolysis occur in anaerobic or aerobic conditions?
Both
What happens to the pyruvate molecules under anaerobic conditions in humans?
They are converted into lactic acid
What happens to the pyruvate molecules under anaerobic conditions in bacteria?
They are converted into ethanol and carbon dioxide (fermentation)
What is the net yield of the glycolysis cycle?
Net yield of 2 ATP
4 ATP produced and 2 ATP required in the process
What happens to pyruvate in aerobic conditions?
It is converted to acetyl coA and passed to the Kreb’s cycle
Where does the Kreb’s cycle take place?
In the matrix of the mitochondrion
What are the major products of the Kreb’s cycle?
3 NADH and 1 GTP (and carbon dioxide)
What is the importance of the Kreb’s cycle?
- It provides as a carbon source for amino acid synthesis
- It provides electrons for the electron transport chain (NADH)
- It generates energy (GTP)
