STPM Biology 964 case studies
STPM Biology 964 · Put your knowledge to work in context.
STPM Biology (964) is the Biology subject of the Sijil Tinggi Persekolahan Malaysia, the Malaysian Higher School Certificate administered by the Malaysian Examinations Council (Majlis Peperiksaan Malaysia, MPM). Candidates usually take it over three terms (Penggal 1, 2 and 3), and results are aggregated into a final subject grade that Malaysian public universities and many overseas institutions recognise for entry. The STPM Biology 964 case studies are 5 cases and about 5,066 words.
1Potato Osmosis: When One Replicate Changes the Answer
A Form Six student studies water relations in potato tissue, using cylinders bored from a single tuber with a 5 mm borer and trimmed to 40 mm. She blots each cylinder, records its mass, and places three cylinders in each of six sucrose solutions (0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 mol dm⁻³).
991 words, about 5 min2Two Affected Brothers, an Unaffected Father and a Missing Restriction Site
A couple, both unaffected, attend a genetics clinic. Their second son has had a bleeding disorder since infancy.
1,064 words, about 5 min3Oxygen for a CO2 Retainer
Mr K, aged 64, has a 45 pack-year smoking history, a chronic productive cough and worsening breathlessness. Spirometry gives FEV1/FVC = 0.51 and FEV1 = 38% of predicted.
961 words, about 5 min4Nine Hundred Flowers and Four Per Cent Fruit Set
Encik R owns 40 mature durian trees of a single clone on 0.6 ha. In April each tree produces about 900 flowers, opening between 19:00 and 22:00.
952 words, about 5 min5An Oxygen Sag in a Small River
A palm oil mill processes 1200 t of fresh fruit bunch per day and produces about 0.6 m³ of effluent per tonne. The final discharge from the last pond has a BOD of 250 mg dm⁻³ against a licence limit of 20 mg dm⁻³, and the tertiary pond is heavily silted.
1,098 words, about 5 min