Biology 9700/51 Oct Nov 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Comparison of respiration rates in germinating seeds, insect larvae, and green algae using a respirometer; calculation of respiration rates per unit mass.
2. Respiratory quotient (RQ) analysis for determining substrate types used in respiration for different organisms.
3. Plant phototropism investigation using auxin diffusion under varying light conditions; statistical analysis of auxin distribution.
4. Sketch and analysis of shoot growth influenced by auxin under directional light exposure.
5. Measurement of radioactive auxin movement in plant tissue and statistical evaluation using a t-test to assess light influence.