Examination Format & Marking Scheme
| Total Marks | 100 |
|---|---|
| Test Duration | 3 Hours (180 Minutes) |
| Negative Marking | 1/3 mark for 1-mark MCQs; 2/3 mark for 2-mark MCQs (No negative marking for NAT / MSQ) |
| General Aptitude (GA) | 10 Questions (5 of 1 mark, 5 of 2 marks) (15 Marks) Verbal ability, quantitative aptitude, analytical reasoning. |
| Section P: Chemistry (Compulsory) | 15 Questions (25 Marks) Atomic structure, chemical bonding, s, p, d block chemistry, thermodynamics, reaction kinetics, organic reaction mechanisms. |
| Any Two Optional Sections from Q to U | 20 Questions per Section (40 Questions Total) (60 Marks) Candidates choose any 2 sections: XL-Q (Biochemistry), XL-R (Botany), XL-S (Microbiology), XL-T (Zoology), XL-U (Food Technology). |
High-Yield Exam Strategy & Pro-Tips
- Chemistry (Section P) is mandatory and carries 25 marks — master fundamental physical, organic, and coordination chemistry to ensure a high qualifying percentile.
- Choosing Section Q (Biochemistry) is strongly recommended for life sciences graduates due to extensive overlap with microbiology, botany, and zoology.
- Numerical Answer Type (NAT) and Multiple Select Questions (MSQ) have NO negative marking; practice exact integer and decimal computations carefully.
Section Q: Biochemistry (Optional Section XL-Q)
Organization of life, biochemical thermodynamics, enzyme kinetics, metabolic pathways, and biochemical separation methodologies.
Biomolecular Architecture & Ramachandran Principles
Peptide bond geometry, phi-psi torsional angles, protein secondary/tertiary folding, and nucleic acid conformations.
Enzymology, Catalytic Mechanisms & Kinetic Formulations
Enzyme kinetics (Km, Vmax, kcat, kcat/Km), allosteric regulation (Hill coefficient), and industrial enzyme immobilization.
Metabolic Integration: Carbohydrates, Lipids & Nitrogen
Glycolysis, gluconeogenesis, glycogenolysis, TCA cycle, oxidative phosphorylation, beta-oxidation, and urea cycle regulation.
Biochemical & Biophysical Analytical Methodologies
Chromatography (HPLC, FPLC, affinity), electrophoresis (SDS-PAGE, IEF), UV-Vis, CD spectroscopy, and mass spectrometry.
Section R: Botany (Optional Section XL-R)
Plant systematics, plant anatomy, embryogenesis, water relations, photosynthesis, mineral nutrition, and plant pathology.
Plant Systematics & Taxonomic Nomenclature
Bentham & Hooker and APG classification systems, major angiosperm families (Brassicaceae, Solanaceae, Poaceae, Fabaceae).
Plant Anatomy, Cambium & Secondary Growth
Meristems, vascular cambium activity, secondary xylem and phloem, periderm, anomalous secondary thickening, and wood anatomy.
Plant Water Relations, Photosynthesis (C3/C4/CAM) & Phytohormones
Water potential, stomatal kinetics, Rubisco catalysis, photoprotection (xanthophyll cycle), and hormone signaling.
Plant Pathology & Defense Signaling Cascades
Fungal, bacterial, and viral plant diseases, pathogen-associated molecular patterns (PAMPs), effectors, and systemic acquired resistance (SAR).
Section S: Microbiology (Optional Section XL-S)
Historical milestones, microbial taxonomy, prokaryotic physiology, microbial genetics, virology, and applied environmental microbiology.
Microbial Taxonomy, Staining & Cell Wall Structures
Bergey's Manual, Gram stain mechanics, acid-fast staining, archaeal ether lipids, and bacterial flagella assembly.
Bacterial Growth Kinetics & Environmental Control
Lag, log, stationary, death phases; specific growth rate (mu); batch and continuous chemostat cultures; autoclaving and filter sterilization.
Virology: Bacteriophages & Animal Viruses
Lytic vs. lysogenic cycles of lambda phage, retrovirus life cycle (HIV reverse transcription), influenza hemagglutinin/neuraminidase, and viral oncogenesis.
Bacterial Genetics: Conjugation, Transposition & Plasmids
F-plasmid transfer, insertion sequences, composite transposons, Ames test for mutagenicity, and horizontal gene transfer.
Section T: Zoology (Optional Section XL-T)
Animal diversity, anatomy and physiology of organ systems, developmental biology, parasitology, immunology, and animal behavior.
Invertebrate & Vertebrate Comparative Anatomy
Coelom types, canal system in sponges, polymorphism in hydrozoa, torsion in gastropoda, and vertebrate evolutionary milestones.
Animal Physiology: Respiration, Circulation & Excretion
Countercurrent exchange in fish gills, mammalian pulmonary ventilation, cardiac cycles, and nephron countercurrent concentration mechanisms.
Developmental Biology: Cleavage, Gastrulation & Organizers
Cleavage patterns (holoblastic vs. meroblastic), morphogenetic movements in gastrulation, and Spemann-Mangold embryonic organizer.
Parasitology: Life Cycles of Human Pathogens
Plasmodium falciparum life cycle (erythrocytic/exoerythrocytic schizogony), Entamoeba, Leishmania donovani, and Wuchereria bancrofti.
Section U: Food Technology & Biotechnology (Optional Section XL-U)
Food chemistry, microbial food spoilage, fermentation technology, recombinant DNA applications, and bioprocess downstream purification.
Food Chemistry, Enzymes & Thermal Inactivation
Maillard browning reactions, caramelization, food emulsifiers, thermal death kinetics (D-value, z-value, F-value), and pasteurization.
Recombinant DNA Tools & Genetic Modification
Restriction enzymes, plasmid cloning, expression vectors, CRISPR genome editing, and recombinant enzyme production.
Fermentation Technology & Downstream Separation
Bioreactor aeration and agitation (kLa measurement), scale-up, cell disruption, membrane filtration, and crystallization.