Every drug you study in Pharmacology works because of a biochemical reaction — enzyme inhibition, receptor binding, metabolic pathway disruption. Biochemistry is the B Pharma 2nd semester subject that teaches you the chemical language of life — how carbohydrates, lipids, proteins, and nucleic acids are built, broken down, and converted into energy inside the human body. Understanding Biochemistry is not optional in pharmacy — it is the molecular foundation of everything from drug metabolism to genetic drug design.
These Biochemistry notes are prepared as per the PCI-approved B Pharma 2nd semester syllabus 2025–26, covering biomolecules and bioenergetics, carbohydrate and lipid metabolism, amino acid and nucleotide biochemistry, molecular biology, and enzyme kinetics. Each unit download has a detailed topic summary. Biochemistry is one of the most important GPAT subjects — glycolysis, Krebs cycle, electron transport chain, beta-oxidation, urea cycle, DNA replication, enzyme kinetics, and isoenzymes appear in virtually every GPAT paper.
Download Biochemistry Notes PDF – Unit Wise
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Course Units
Unit 1: Biomolecules and Bioenergetics
Topics Covered: the classification, chemical nature, and biological roles of carbohydrates, lipids, nucleic acids, amino acids, and proteins, along with concepts of bioenergetics, free energy, ATP, and cyclic AMP.
Unit 2: Carbohydrate Metabolism and Biological Oxidation
Topics Covered: Explains glycolysis, citric acid cycle, HMP shunt, glycogen metabolism, gluconeogenesis, hormonal regulation of blood glucose, diabetes, electron transport chain, oxidative phosphorylation, and their inhibitors.
Unit 3: Lipid and Amino Acid Metabolism
Topics Covered: Includes fatty acid oxidation and synthesis, cholesterol metabolism, lipid disorders, amino acid reactions, urea cycle, metabolism of phenylalanine and tyrosine, synthesis of neurotransmitters, and heme catabolism.
Unit 4: Nucleic Acid Metabolism and Genetic Information Transfer
Topics Covered: Discusses purine and pyrimidine biosynthesis, nucleotide catabolism, genome organization, DNA and RNA structure, replication, transcription, translation, and regulation of genetic information.
Unit 5: Enzymes and Coenzymes
Topics Covered: enzyme properties, classification, kinetics, inhibition, regulation, therapeutic and diagnostic applications of enzymes and isoenzymes, and the structure and function of coenzymes.
What is Biochemistry?
Biochemistry is the branch of science that explores the chemical processes and substances that occur within living organisms. It connects biology and chemistry by studying the molecular mechanisms of life — from enzyme action and metabolism to genetic information and energy production.
These notes will help you understand topics like:
Biomolecules: Carbohydrates, Proteins, Lipids, Nucleic Acids
Enzymes: Classification, Mechanism of Action, Enzyme Kinetics
Vitamins & Coenzymes: Role, deficiency diseases, and biochemical importance
Metabolism: Pathways of carbohydrate, lipid, and protein metabolism
Bioenergetics: ATP cycle, energy production, and utilization
Molecular Biology Basics: DNA replication, transcription, and translation
Clinical Biochemistry: Blood glucose regulation, liver and kidney function tests
Frequently Asked Questions (FAQ)
Q1. Why is Biochemistry important for Pharmacy students?
Biochemistry provides the molecular foundation for pharmacology. Every drug works through biochemical reactions, such as enzyme inhibition or receptor binding. Understanding how the body processes carbohydrates, lipids, and proteins is essential for understanding drug metabolism and genetic drug design.
Q2. Which topics are most important for the GPAT exam?
Biochemistry is a high-weightage subject for GPAT. Key topics covered in these notes that frequently appear in exams include:
Metabolic Pathways: Glycolysis, Krebs cycle (Citric Acid Cycle), and the Urea cycle.
Energy Production: The Electron Transport Chain (ETC) and Oxidative Phosphorylation.
Enzymes: Kinetics, inhibition types, and isoenzymes.
Molecular Biology: DNA replication, transcription, and translation.
Q3. What is covered in the "Biomolecules and Bioenergetics" unit?
Unit 1 focuses on the structural chemistry and biological roles of:
Carbohydrates, Lipids, and Proteins.
Nucleic acids (DNA/RNA).
High-energy compounds like ATP and Cyclic AMP.
Q4. Does the syllabus include Molecular Biology?
Yes. Unit 4 covers Genetic Information Transfer, including the organization of the mammalian genome and the processes of replication, transcription, and translation.