Biochemistry

Study of chemical processes within and relating to living organisms.

Macromolecules of LifeEnzymes and Biochemical ReactionsCellular Energy and Metabolism
Genetic Information and Molecular BiologySignal Transduction and Cell CommunicationBiochemical Techniques and Tools
Biochemistry in MedicineBiochemistry in Agriculture and FoodEnvironmental Biochemistry
Active Learning with DiagramsPractice with Real-World Problems
Macromolecules of Li...Enzymes and Biochemi...Cellular Energy and ...Genetic Information ...Signal Transduction ...Biochemical Techniqu...Biochemistry in Medi...Biochemistry in Agri...Environmental Bioche...Active Learning with...Practice with Real-W...
Basic Concepts

Cellular Energy and Metabolism

Powering the Cell

All living things need energy to grow, move, and reproduce. Cells obtain and use energy through a series of chemical reactions known as metabolism.

ATP: The Energy Currency

  • ATP (adenosine triphosphate) stores and transfers energy within cells.
  • Cells produce ATP mainly through cellular respiration.

Metabolic Pathways

  • Catabolism: Breaking down molecules to release energy.
  • Anabolism: Building complex molecules using energy.

Major Processes

  • Glycolysis: The breakdown of glucose to produce ATP.
  • Photosynthesis: Plants capture sunlight to make food and oxygen.

The balance of these processes keeps cells alive and functioning.

Examples

  • Your muscles use ATP to contract during exercise.

  • Plants convert sunlight into chemical energy through photosynthesis.

In a Nutshell

Cells run on ATP, produced and used in complex metabolic pathways.

Next
Genetic Information and Molecular Biology