Biochemistry is the branch of science that studies the chemical substances and processes that occur in living organisms. It combines concepts from chemistry and biology to explain how cells function and how life is sustained.
Main Topics in Biochemistry
- Biomolecules
- Carbohydrates – primary source of energy.
- Lipids (Fats) – energy storage, insulation, and cell membrane structure.
- Proteins – building blocks of tissues and enzymes.
- Nucleic Acids (DNA and RNA) – store and transmit genetic information.
- Enzymes
- Biological catalysts that speed up chemical reactions in the body.
- Factors affecting enzyme activity include temperature, pH, and substrate concentration.
- Metabolism
- Catabolism – breakdown of molecules to release energy.
- Anabolism – synthesis of complex molecules needed for growth and repair.
- Cellular Respiration
- Process by which cells produce ATP (energy).
- Includes glycolysis, the citric acid cycle, and oxidative phosphorylation.
- Molecular Genetics
- Structure and function of DNA and RNA.
- Protein synthesis through transcription and translation.
- Bioenergetics
- Study of energy flow in living systems.
- ATP is known as the cell's energy currency.
- Hormones and Cell Signaling
- Chemical messengers that regulate body functions.
- Communication between cells through signaling pathways.
Importance of Biochemistry
- Helps understand human health and disease.
- Essential in medicine, nursing, pharmacy, nutrition, agriculture, and biotechnology.
- Supports the development of drugs, vaccines, and diagnostic tests.
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