| Skill Area | What It Assesses | Approx. Marks in Paper 3 | | :--- | :--- | :--- | | | Your ability to handle equipment, take accurate measurements, and record precise observations. | 16 | | Presentation of Data & Observations | Your skill in creating clear results tables, graphs, and biological drawings. | 12 | | Analysis, Conclusions & Evaluation | Your ability to interpret results, draw valid conclusions, and identify errors. | 12 | | Planning | (Mainly in Paper 5) Your ability to design a valid experiment, identifying and controlling variables. | N/A |
The following practical techniques are covered in the Biology 9700 practical notes:
The difference between an experimental value and the true value.
The practical component of the Biology 9700 syllabus accounts for 20% of the total marks. It assesses students' ability to:
Value of 1 epu=Number of micrometer divisions×Size of 1 micrometer divisionNumber of eyepiece divisionsValue of 1 epu equals the fraction with numerator Number of micrometer divisions cross Size of 1 micrometer division and denominator Number of eyepiece divisions end-fraction Magnification Formula biology 9700 practical notes
If the initial Benedict's test is negative, heat a fresh sample with dilute hydrochloric acid (
, reject the null hypothesis. The difference between observed and expected results is statistically significant. 6. Exam Strategy & Common Pitfalls Distinguishing Error, Precision, and Accuracy
of the grid area. Avoid awkward scale intervals like 3 or 7 units per square block.
If an experiment requires a 20-minute water bath incubation, set it up right away. Use that waiting window to execute microscopy work, complete calculations, or design your data tables. | Skill Area | What It Assesses | Approx
In both papers, examiners are looking for evidence of four key skill areas, which you can think of as the pillars of practical success:
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.
Preparing precise concentrations is critical for generating standard curves or testing enzyme kinetics. You must master both proportional and logarithmic dilution methods.
This paper tests your ability to manipulate equipment, make observations, and record data. | 12 | | Analysis, Conclusions & Evaluation
Draw only the outlines of tissue layers. Never draw individual cells in a plan diagram.
You must memorize the color changes and specific procedures for identifying biological molecules. Reagent Used Positive Result Negative Result Important Details Benedict's Solution Green, Yellow, Orange, or Brick-Red ppt Remains Blue
Submerge cylinders in the respective sucrose concentrations for a minimum of 30 minutes.
: Lines must be sharp, continuous, and drawn with a sharp pencil (no shading).
Enzyme experiments typically investigate how factors like temperature, pH, enzyme concentration, or substrate concentration affect the rate of reaction. Quantifying the Dependent Variable