Biology 9700 Practical Notes !!install!! -

: You need to know which statistical test to use for different data types. Important skills include calculating mean , standard deviation , and choosing the right test.

Know how to use a stage micrometer to find the value of one eyepiece graticule unit (epu). 2. Biological Molecule Tests (The Basics)

) or circled dots. Scale the axes so your data occupies more than half of the grid. Connect points with straight, ruled lines unless asked for a line of best fit. Microscope Skills biology 9700 practical notes

Proportional Dilution: Mixing specific volumes of a stock solution with distilled water to get targeted concentrations (e.g.,

Examiners heavily penalize students who confuse "errors" with "mistakes." A mistake is spilling a solution. An error is an inherent limitation of the apparatus or procedure. Calculating Percentage Uncertainty : You need to know which statistical test

You must be able to perform and interpret these five standard tests flawlessly: Positive Result Heat Required? Benedict’s Solution →right arrow →right arrow →right arrow Yes (80°C+) Non-Reducing Sugars HCl (hydrolysis), then Benedict’s Starch Iodine in KI Blue-Black Proteins Biuret Reagent Purple/Violet Lipids Ethanol (Emulsion test) Milky White Emulsion 3. Enzyme Experiments & Variables

Essential for securing top marks (A/A*), provided they focus on command words and mathematical rigour . Connect points with straight, ruled lines unless asked

Choose a scale where the plotted points occupy more than half of the grid area. Use sensible intervals (e.g., 1s, 2s, 5s, or 10s). Plotting: Use a sharp pencil to make small marks or a dot surrounded by a small circle ⊙circled dot

You must know how and when to apply basic statistical tests:

, . There is a statistically significant difference or correlation.