Energy Metabolism Flashcards
Metabolic Pathway:
A series of reaction occurring in a cell
Anabolic Pathway:
Synthesis pathways that build more complex molecules from simpler molecules
Anabolic Pathway Energetics:
Requires energy input
Anabolic Pathway Examples:
Photosynthesis, building starch
Catabolic Pathway:
Breakdown pathways that convert complex molecules to simpler molecules
Catabolic Pathway Energetics:
Releases energy
Catabolic Pathway Example:
cellular respiration, breakdown of starch into sugars
Energy management molecules in metabolic reactions roles:
Temporarily store energy released
Example Molecule: ATP
- What is transferred in the reaction:
- Detailed reaction:
Phosphate, ATP + H20 –> ADP + Pi
Example Molecule: NADH
- What is transferred in the reaction:
- Detailed reaction:
Electrons, NAD+ + 2e- + 2H+ –> NADH + H+,
_____________
- ATP –> ADP as part of a coupled reaction
- NADH –> NAD+ as part of a coupled reaction
- NADPH –> NADP+ as part of a coupled reaction
- Glucose + O2 –> CO2 + H2O in a series of reactions
Energetically Favorable
_____________
- ADP –> ATP as part of a coupled reaction
- NAD+ –> NADH as part of a coupled reaction
- NADP+ –> NADPH as part of a coupled reaction
- CO2 + H2O –> Glucose + O2 in a series of reactions
Energetically Unfavorable