BCHET-149 IGNOU Solved Assignment 2026-27

Course Scope and Syllabus Overview for BCHET-149: Molecules of Life

BCHET-149 Molecules of Life is a core course under the Bachelor of Science (BSCG) program within IGNOU’s School of Sciences (SOS), designed to explore the fundamental biochemical principles governing cellular architecture and function. This course bridges molecular chemistry and biological systems, emphasizing the structural and functional diversity of biomolecules—carbohydrates, proteins, lipids, and nucleic acids—while integrating their roles in metabolic pathways and bioenergetics. Students gain analytical skills to interpret biochemical mechanisms, apply thermodynamic principles to metabolic processes, and correlate molecular interactions with cellular physiology, preparing them for advanced studies in biochemistry, molecular biology, and related disciplines.

Key Syllabus Units & Topics

• Cell Structure and Carbohydrates: Examines the ultrastructure of cells, focusing on the composition, classification, and biological significance of monosaccharides, disaccharides, and polysaccharides, including their roles in energy storage and structural support.
• Amino Acids, Peptides, and Proteins: Covers the structure, classification, and conformational properties of amino acids, peptide bond formation, and protein folding, with emphasis on primary, secondary, tertiary, and quaternary structures.
• Enzymes: Explores enzyme catalysis, kinetic mechanisms (Michaelis-Menten theory), regulation (allosteric and covalent modification), and classification based on catalytic function and substrate specificity.
• Lipids and Nucleic Acids: Analyzes the structure and diversity of lipids (fatty acids, phospholipids, steroids) and nucleic acids (DNA/RNA), including replication, transcription, and genetic code interpretation.
• Bioenergetics and Metabolism: Investigates energy transformations in biological systems, metabolic pathways (glycolysis, Krebs cycle, oxidative phosphorylation), and the role of ATP as the universal energy currency.

Frequently Asked Questions

Q: What is the word count requirement for Section A of the TMA in BCHET-149, and how does it differ from Section B?
A: Section A of the TMA requires a concise response of approximately 500 words per question, while Section B demands 250 words per question, adhering strictly to IGNOU’s specified guidelines for clarity and depth.

Q: How are marks distributed in the BCHET-149 examination, and what percentage of the total grade does the TMA contribute?
A: The TMA carries 30% weightage in the final grade, while the remaining 70% is allocated to the term-end theory examination, which includes both short-answer and descriptive questions covering the entire syllabus.