Biology 9700/35 May June 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Seasonal starch concentration in plant root extracts using iodine test; prediction of color changes to match samples with seasons.

2. Glucose concentration estimation in root extracts by comparison with standards, recording time for color change, and investigation refinement for accuracy.

3. Systematic errors in measurement apparatus, their impact on trends, and error minimization in starch and glucose testing.

4. Water loss in roots during storage, graphical analysis of percentage water loss, and osmotic gain in dilute sucrose for rehydrated roots.

5. Plan diagrams of blood vessels showing structural differences in vessel linings and detailed drawings of white blood cells from photomicrographs.

6. White blood cell count variation as an indicator of cancer, measurement of red blood cell lengths, and structural comparison between healthy and diseased blood samples.