KEAM Medical and Medical Allied: Physics, Chemistry and Biology
What this domain tests
The medical and allied domain is the Physics–Chemistry–Biology stream: human physiology, genetics, cell biology, biomolecules, organic chemistry, mechanics and optics. In Kerala, MBBS and BDS seats are currently filled through NEET, and the CEE prospectus is the authoritative list of which medical-allied courses use KEAM in a given year. The PCB concepts below are still the core tested by entrance papers in this stream.
Core rules and concepts
- Homeostasis: negative feedback keeps temperature, pH, glucose and osmolarity stable.
- Genetics: Mendel’s laws, codominance, multiple alleles, sex-linked inheritance and pedigree analysis.
- Physiology: know gas exchange, cardiac cycle, nephron function, nerve impulse and hormone axes.
- Chemistry: pH = −log[H⁺], buffers, functional-group reactions, stereochemistry and biomolecule tests.
- Physics: pressure, flow, surface tension, lens power and radiation dosage in medical contexts.
Worked example
A man with blood group A (genotype IAi) and a woman with blood group B (genotype IBi) have children. Set up the Punnett square: gametes IA, i and IB, i. Offspring genotypes are IAIB, IAi, IBi and ii in equal proportions. Phenotypes: 1/4 AB, 1/4 A, 1/4 B and 1/4 O. The reasoning depends on IA and IB being codominant and both dominant to i; neither parent is homozygous, so an O child is possible.
Traps that cost marks
Confusing antigen with antibody; assuming blood group A is always homozygous; using pH = −log[H⁺] without activity corrections in concentrated solutions; and mixing NEET and KEAM eligibility rules. In physiology, check whether the question asks for a normal value, a direction of change, or a feedback response.