Place the independent variable in the first column, and the dependent variable in subsequent columns.
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.
Insert the eyepiece graticule and place the stage micrometer on the microscope stage. Focus under low power ( objective lens) and align the zero lines of both scales.
Use a sharp HB pencil. Draw clear, single, continuous lines. No sketching, shading, or cross-hatching. biology 9700 practical notes
1timethe fraction with numerator 1 and denominator time end-fraction
The independent variable always goes in the left column. All columns must have clear headings and units (e.g., /
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Place the independent variable in the first column,
You must know how to identify macromolecules and prepare specific concentrations of solutions. The Benedict's Test for Reducing and Non-Reducing Sugars
If the initial Benedict's test was blue, but turns red after acid hydrolysis, a non-reducing sugar is present. Iodine Test for Starch
Separating pigments (chlorophyll a, chlorophyll b, carotenes, and xanthophylls) from leaves helps evaluate photosynthetic adaptations. Use a sharp HB pencil
High power drawings should show a small number of cells, drawn at a reasonable size so detail inside them can be shown.
Plot the independent variable on the x-axis and the dependent variable on the y-axis. Label both axes clearly with names and units.
You must master both proportional and logarithmic dilutions. This is critical for determining the effect of substrate/enzyme concentration or finding the water potential of plant tissues. Enzyme Studies:
Ensure all values use the same units before calculating. Rules for Low-Power and High-Power Plan Drawings
Used to compare observed categorical data with expected frequencies (e.g., genetics phenotypic ratios).