8 Questions
What is the energy currency of life?
ATP
What are the molecules degraded or synthesized in a series of reactions termed?
Metabolic pathways
What is the primary source of ATP production in a metabolic sense?
Oxidation of carbon compounds
What regulates metabolic pathways?
Regulatory enzymes
What is the main purpose of catabolism?
To yield energy from nutrient molecules
Which type of reaction is characteristic of anabolism?
Endergonic reactions requiring energy investment
What is the energy exchanger linking catabolism and anabolism?
ATP
What is the energy state of the initial compounds in exergonic reactions?
Higher than the energy state of the final products
Study Notes
Energy and Metabolism
- The energy currency of life is ATP (Adenosine Triphosphate).
- In a series of reactions, molecules are degraded or synthesized, known as cellular respiration or metabolism.
ATP Production
- The primary source of ATP production is cellular respiration, which occurs in the mitochondria.
Regulation of Metabolic Pathways
- Metabolic pathways are regulated by allosteric control, substrate inhibition, and energy status of the cell.
Catabolism
- The main purpose of catabolism is to break down molecules to release energy, which is then used to generate ATP.
Anabolism
- Anabolism is characterized by endergonic reactions, which require energy to synthesize new molecules.
Energy Exchange
- Coenzyme A (CoA) is the energy exchanger linking catabolism and anabolism.
Exergonic Reactions
- The energy state of the initial compounds in exergonic reactions is high energy, resulting in a spontaneous release of energy.
Test your knowledge of metabolism with this quiz! Explore the enzyme-catalyzed transformations of organic molecules in living cells and learn about the energy transductions and ATP usage essential for cell function and survival.
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