Biology 9700 Practical Notes _best_

Draw straight label lines with a ruler. Lines must touch the structure exactly and must not cross over each other. Do not use arrowheads. 5. Data Presentation and Graphing Draw your table using a ruler with fully enclosed cells. Place the independent variable in the first column.

Connect data points directly with straight, ruled lines from point to point unless instructed to draw a smooth curve or a line of best fit. Never extrapolate your line beyond your first or last data points.

: A poorly constructed table loses easy marks. Your results table must have:

Enclose all cells with clear border lines. Place the independent variable in the first column.

Practical work for AS Level requires mastery in manipulating apparatus and making accurate observations. : biology 9700 practical notes

) in a boiling water bath for 2 minutes to hydrolyze the glycosidic bonds.

: Your recorded data should reflect the precision of the equipment used (e.g., a ruler in mm or a thermometer in 0.5°C increments). 4. Planning and Evaluation (Paper 5)

Biochemical tests are a staple of Paper 3. You must know how to perform them, identify positive/negative results, and understand the underlying science. Benedict’s Test for Reducing Sugars Glucose, fructose, maltose, galactose.

Must include the quantity and the unit separated by a slash (e.g., Temperature / °C Consistency: Draw straight label lines with a ruler

Use a sharp pencil to draw small, neat crosses ( ) or ringed dots.

Plot the Independent variable on the x-axis and the Dependent variable on the y-axis. Use an appropriate scale and sharp pencil. Biological Drawing Rules: No shading or sketching. Use large drawings (at least half the page). Label using straight lines that do not cross. State the magnification.

Use Pearson's for normally distributed, linear quantitative data.

: Always include units in the column headings only (e.g., "Time / s"), not within the data cells. : Ensure the independent variable is on the x-axis and the dependent variable Connect data points directly with straight, ruled lines

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Mixing different volumes of a stock solution with distilled water to achieve a target concentration.

Read volumes at eye level, focusing on the bottom of the meniscus. To tailor these study materials further, let me know:

Dissolve the sample in absolute ethanol and shake vigorously. Pour the liquid layer into a test tube of cold water. A cloudy, milky-white emulsion confirms lipids. Microscopy and Calibration