Biology 9700 Practical Notes 💯 Recommended

Explain possible reasons for discrepancies (e.g., temperature fluctuations, contamination, inconsistent tissue samples) and suggest improvements for future investigations. Do not ignore anomalies — address them directly.

Column headers must state the variable name and its unit, separated by a slash (e.g., Temperature / °C or Time / s ). Do not put units next to individual raw numbers inside the data rows.

Improvement: Test a wider range of intermediate concentrations/temperatures.

Measure changes in mass, length, or the percentage of plasmolysed cells under a microscope. biology 9700 practical notes

Let’s cut the fluff. Here are your high-yield practical notes.

Every column must have a clear heading. Separated the measurement name and its unit using a forward slash (e.g., Time / s , Temperature / °C , Volume of gas / cm³ ).

Cool and neutralize the acid by adding Sodium Hydrogencarbonate ( NaHCO3NaHCO sub 3 ) until effervescence ceases. Perform the standard Benedict’s test. Explain possible reasons for discrepancies (e

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% Change=Final Mass−Initial MassInitial Mass×100% Change equals the fraction with numerator Final Mass minus Initial Mass and denominator Initial Mass end-fraction cross 100

Enzyme experiments usually measure the rate of product formation or substrate depletion. Common enzymes tested include (breaking down hydrogen peroxide into water and oxygen) and amylase (breaking down starch into maltose). Do not put units next to individual raw

Explicitly state the independent variable (with 5 chosen concentrations), the dependent variable (how and when it is measured), and at least three critical variables to keep constant (with specific methods to control them).

Always use a thermostatically controlled water bath. Controlling pH: Use buffer solutions. D. Diffusion and Osmosis

Always use a sharp pencil, clear lines, and draw only what you see (not a textbook diagram). Label structures clearly and state the magnification used. B. Food Tests (Biochemical Analysis)

To improve accuracy, use better instruments. To improve precision, control all variables carefully. To improve reliability, take repeat readings and calculate the mean.

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