Biology 9700/51 Oct Nov 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of the effect of temperature on respiration in Chlorella, including hypothesis formulation, identification of independent and dependent variables, and use of apparatus to measure CO₂ production.

2. Calculation and graphical representation of respiration rates based on cell density, along with statistical analysis using Pearson's correlation coefficient and hypothesis testing.

3. Evaluation of fungal pathogen infection effects on melon plants, including tissue localization, inheritance patterns of resistance, and analysis of anomalous F2 generation ratios.

4. Application of microarray techniques to detect mRNA and study gene expression differences in resistant and non-resistant melon plant varieties under fungal pathogen infection.

5. Quantitative analysis of gene expression changes, including ratio and percentage change calculations, to assess resistance mechanisms in plants.

6. Interpretation of biological data and experimental outcomes to evaluate hypotheses and determine the validity of conclusions in plant pathology and molecular biology contexts.