(c) The student forgot to include a control vial with glass beads (no crickets). Explain why a control is necessary. (2 marks)
(b) Predict the relative rate of oxygen consumption at 30°C vs 20°C. Explain your answer in terms of enzyme kinetics and metabolic rate. (3 marks)
(c) If 320 offspring are produced, how many are expected to have purple flowers and pointed leaves? Show your working. (2 marks) singapore junior biology olympiad past papers
In Arabidopsis thaliana , flower color is controlled by a single gene with two alleles: Purple (P) dominant over white (p). Another unlinked gene controls leaf shape: Round (R) dominant over pointed (r).
(a) List two structural adaptations of the alveolus that maximize gas exchange. (2 marks) (c) The student forgot to include a control
(d) If the experiment used germinating mung beans instead of crickets, how would the results differ? Why? (2 marks)
Below is a structured set of original questions (Section A: Multiple Choice, Section B: Structured/Free Response), followed by a detailed answer key and performance analysis guide. Subject: Junior Biology Olympiad Time: 1 hour 30 minutes (simulated) Total Marks: 60 Section A: Multiple Choice (30 marks) Questions 1 to 15. Each correct answer earns 2 marks. Select the single best answer. Explain your answer in terms of enzyme kinetics
This is a development of modeled exactly on the style and difficulty of the Singapore Junior Biology Olympiad (SJBO) . Since actual past papers are copyrighted, this serves as a faithful simulation for training.