JCE Biology case studies
JCE Biology · Put your knowledge to work in context.
The Junior Certificate Examination (JCE) Biology is a school-leaving qualification in Botswana, typically taken at the end of Junior Secondary education. It is designed for learners who have completed the three-year junior secondary science programme and wish to obtain a formal certification recognised for progression to senior secondary or vocational pathways. The JCE Biology case studies are 5 cases and about 2,311 words.
1Potato Osmosis: When to Reject an Anomalous Result
A student cut five potato cylinders, each 4.0 cm long and 2.00 g, from the same tuber. Each was blotted, weighed, and placed in a labelled beaker containing 0.0, 0.2, 0.4, 0.6 and 0.8 mol/dm³ sucrose solution for 30 minutes.
500 words, about 3 min2Tomato Hydroponics: Interveinal Yellowing and Starch Testing
A school greenhouse grows tomato plants in two hydroponic beds. The nutrient solution in bed A contains nitrate, phosphate, potassium, calcium, sulfate and iron, but the bottle of magnesium sulfate was left out for six weeks.
471 words, about 2 min3Dialysis: Gradients, Counter-Current Flow and Potassium
A patient with kidney failure attends a dialysis unit three times a week. During a session, blood is passed through a dialyser containing many fine tubes made of a partially permeable membrane.
437 words, about 2 min4Heat Loss and Dehydration in a 10 km Race
On a hot day (32 °C), a trained runner completes a 10 km race. Before the race her body temperature is 37.1 °C, heart rate 68 beats/min, breathing rate 14/min, and urine output over the previous 2 hours was 400 cm³.
472 words, about 2 min5Albinism in a Family: Recessive Inheritance and Sex Linkage
In a family, both parents have normal skin, hair and eye pigmentation. They have three children: a daughter with albinism, a son with albinism, and a daughter with normal pigmentation.
431 words, about 2 min