Biology 9700 Practical Notes (HIGH-QUALITY × 2025)

Record all raw values within a column to the exact same degree of precision (e.g., if reading a burette, record all values to the nearest Graphing Standards

In the evaluation section, you’ll be asked for "limitations" and "improvements." "The color change was subjective."

This guide breaks down the essential notes you need to turn your practical sessions into high-scoring performances. 1. Mastering the Microscopy (The Visuals)

Observing osmosis in potato tissue or plasmolysis in onion epidermis. biology 9700 practical notes

Track the disappearance of substrate (e.g., starch using iodine) or the appearance of product (e.g., oxygen gas from hydrogen peroxide breakdown). Serial Dilutions: A critical skill often tested.

Interpreting data and identifying errors. 2. Quantitative & Qualitative Techniques 2.1 Biological Testing (Qualitative Analysis) These tests require precision in observation.

: You must memorize these, as instructions aren't always provided. Reducing Sugars Record all raw values within a column to

"There is no significant difference between [Group A] and [Group B]. Any difference is due to chance."

Here are some practical notes and techniques that students should be familiar with:

You can know the theory of glycolysis inside out, but if you can’t use a graticule or spot contamination in a dilution series, you will lose marks. Track the disappearance of substrate (e

It was 11:47 PM. The A-Level Biology practical exam (9700) was in nine hours.

: Used to show the distribution of tissues (e.g., leaf, dicot stem, dicot root).

Choose a scale where the plotted data occupies more than half of the grid area in both directions. Use sensible intervals (1s, 2s, 5s, or 10s). Never use awkward scales like 3s or 7s.

Separating pigments (chlorophyll a, chlorophyll b, carotenes, and xanthophylls) from leaves helps evaluate photosynthetic adaptations.

Cut potato cylinders to identical lengths using a cork borer and a razor blade. Record the initial mass or length of each cylinder.