Biochem imo ut topics for 1st yr bds
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Biochemistry important topics 1st year BDS university exam IMO
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Here's a solid rundown of the most important Biochemistry topics for 1st year BDS university (IMO) exams, based on past paper analysis and the standard BDS syllabus:
Biochemistry - 1st Year BDS: Important Topics (IMO / University Exams)
SECTION A - Carbohydrate Metabolism ⭐⭐⭐ (Most Important)
| Topic | Type |
|---|---|
| Glycolysis - steps, energetics, aerobic vs anaerobic, ATP yield | Long essay |
| TCA / Citric Acid Cycle - steps, energetics, significance | Long essay |
| Gluconeogenesis - steps, substrates, key enzymes | Long essay |
| Glycogenesis & Glycogenolysis | Short note |
| Blood glucose regulation (insulin, glucagon, hormonal control) | Essay/short note |
| Pentose phosphate pathway / HMP shunt | Short note |
SECTION B - Lipid Metabolism ⭐⭐⭐
| Topic | Type |
|---|---|
| Beta-oxidation of fatty acids - steps, ATP yield | Long essay |
| De novo synthesis of fatty acids | Essay |
| Cholesterol synthesis - steps, rate-limiting enzyme (HMG-CoA reductase) | Essay |
| Ketogenesis / Ketosis / Ketonemia | Short note |
| Fatty liver - causes, lipotropic factors | Short note |
| Classification of lipoproteins (VLDL, LDL, HDL, chylomicrons) | Short note |
| Classification of lipids / Phospholipids | Short note |
SECTION C - Proteins & Amino Acid Metabolism ⭐⭐
| Topic | Type |
|---|---|
| Structure of proteins - primary, secondary (alpha helix, beta sheet), tertiary, quaternary | Essay |
| Transamination & Deamination | Short note |
| Urea cycle - steps, significance, hyperammonemia | Essay |
| Classification of amino acids (essential, non-essential) | Short note |
| Phenylketonuria (PKU) and other amino acid disorders | Short note |
SECTION D - Enzymes ⭐⭐⭐
| Topic | Type |
|---|---|
| Classification of enzymes (IUB system, 6 classes with examples) | Essay |
| Enzyme kinetics - Michaelis-Menten equation, Km, Vmax | Essay |
| Inhibition of enzymes - competitive, non-competitive, uncompetitive | Essay |
| Isoenzymes - LDH, CK isoenzymes, clinical significance | Short note |
| Coenzymes and cofactors | Short note |
| Regulation of enzyme activity | Short note |
SECTION E - Vitamins ⭐⭐
| Topic | Type |
|---|---|
| Fat-soluble vitamins (A, D, E, K) - sources, functions, deficiency, hypervitaminosis | Essay |
| Water-soluble vitamins: | |
| - Vitamin C (Ascorbic acid) - functions, deficiency (Scurvy) | Short note |
| - Thiamine (B1) - Beri-beri | Short note |
| - Riboflavin (B2), Niacin (B3) - Pellagra | Short note |
| - B12 & Folic acid - megaloblastic anemia | Short note |
| B-complex vitamins together - functions and deficiencies | Essay |
SECTION F - Biological Oxidation ⭐⭐
| Topic | Type |
|---|---|
| Electron Transport Chain (ETC) - complexes, components, sequence | Long essay |
| Oxidative Phosphorylation - chemiosmotic theory, ATP synthase | Essay |
| Substrate-level vs oxidative phosphorylation | Short note |
| Inhibitors of ETC (cyanide, rotenone, etc.) | Short note |
SECTION G - Nucleic Acids & Molecular Biology ⭐⭐
| Topic | Type |
|---|---|
| DNA structure - Watson-Crick double helix model | Short note |
| Types of RNA - mRNA, tRNA, rRNA and their functions | Short note |
| Genetic code - properties, codons | Short note |
| Mutations - types with examples | Short note |
| Nucleotides & Nucleosides - structure and examples | Short note |
| DNA replication | Short note |
SECTION H - Cell Biology & Miscellaneous
| Topic | Type |
|---|---|
| Fluid mosaic model of cell membrane | Short note |
| Lysosomes - structure and function | Short note |
| Mitochondria - structure and function | Short note |
Dental Relevance Topics (often asked in BDS specifically)
- Fluoride and enamel - biochemical basis of dental caries
- Collagen structure - types, significance in periodontal tissue and bone
- Calcium & Phosphate metabolism - role of vitamin D, PTH
- Salivary biochemistry - composition, enzymes in saliva
Quick Prioritization
Must-do for essays (10-mark questions):
- Glycolysis
- TCA Cycle
- Gluconeogenesis
- Beta-oxidation of fatty acids
- Urea cycle
- Enzyme classification & kinetics
- ETC & Oxidative phosphorylation
- Fatty acid synthesis
Must-do short notes (5-mark):
Ketosis, Cholesterol synthesis, Lipoproteins, Fatty liver, Isoenzymes, DNA structure, Types of RNA, Vitamin C, PKU
This covers the bulk of what appears repeatedly across university question papers. Focus especially on the metabolic pathway topics with full steps + energetics, as they consistently fetch the highest marks.
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