Karnataka II PUC Biology (KSEAB) case studies
Karnataka II PUC Biology (KSEAB) · Put your knowledge to work in context.
The Karnataka II PUC Biology examination is the second-year pre-university board paper set by the Karnataka School Examination and Assessment Board (KSEAB), taken by students who have completed the two-year pre-university science course and need a Biology mark for university admission in science, agriculture, nursing, pharmacy and allied fields. It is a board examination, not a competitive entrance test: the goal is broad syllabus coverage and clear, correct answers rather than speed against a national pool. The syllabus is the NCERT-aligned Class 12 Biology course, so the paper mixes one-mark objective and very short answer items with short answer questions, longer structured answers, and diagram-based questions where labelled drawings carry marks. Genetics and evolution, reproduction in its various forms, biotechnology, and ecology carry the largest share of the paper, with cell biology, plant physiology and human physiology rounding it out. The Karnataka II PUC Biology (KSEAB) case studies are 5 cases and about 3,728 words.
1Hybrid brinjal seed production with a male-sterile line
An F1 hybrid brinjal (Solanum melongena) seed programme has 1,200 plants. Brinjal flowers are hermaphrodite and normally self-pollinate, and anthers dehisce in the early morning.
798 words, about 4 min2Two affected brothers, a normal mother and a negative DNA test
Two unaffected parents bring their two sons, aged 6 and 3, to a district hospital. Both boys bruise easily and have prolonged bleeding after minor cuts; the older boy had joint swelling after a fall.
744 words, about 4 min3Cloning insulin cDNA into pUC19
A final-year student wants E. coli to express human insulin.
767 words, about 4 min4Polyuria after head injury: interpreting a water-deprivation test
A 24-year-old man is admitted after a motorcycle accident with a minor head injury. He recovers, but 3 months later he complains of passing 8–10 L of dilute urine a day and drinking constantly.
712 words, about 4 min5A sewage-polluted urban lake: choosing an intervention
A 60-hectare urban lake receives untreated sewage from a 5,000-person settlement. In summer, Secchi depth falls to 0.3 m, chlorophyll a is 120 µg/L, dissolved oxygen at 2 m depth is 1.5 mg/L at dawn, and Microcystis dominates the phytoplankton.
707 words, about 4 min