Biologjia 11 Today
✅ – “The experiment was performed” instead of “We did the experiment.”
✅ – “The temperature was measured” not “The temperature is measured.” 4. Common Grade 11 Biology Topics (choose one for your report) | Topic | Sample Research Question | |-------|--------------------------| | Enzymes | How does pH affect catalase activity? | | Cell transport | Does salt concentration affect potato mass (osmosis)? | | Photosynthesis | How does light color affect oxygen production in elodea? | | Cellular respiration | Does temperature affect yeast CO₂ production? | | Genetics | What is the chi-square ratio for a monohybrid cross? | | Evolution | How does natural selection affect allele frequency in a simulation? | | Biodiversity | How does species diversity differ between two local ecosystems? | If you tell me your specific lab or research topic , I can write a custom report outline or full example for you. Good luck!
Amylase is an enzyme that breaks down starch into maltose. Enzymes are proteins that function best at an optimal temperature. In humans, amylase works best at 37°C. This experiment tests the hypothesis: Increasing temperature up to 40°C will increase the rate of starch breakdown, but temperatures above 60°C will denature the enzyme, reducing activity. biologjia 11
Temperature significantly affects amylase activity. The optimal temperature for amylase is 37°C, and extreme heat (70°C) causes denaturation. This confirms the lock-and-key model of enzyme function.
The results support the hypothesis: 37°C was optimal, as kinetic energy increased collisions between enzyme and substrate. At 10°C, molecules moved slowly, reducing reaction rate. At 70°C, heat denatured the enzyme’s active site, permanently destroying function. A source of error was inconsistent mixing; future experiments could use a spectrophotometer for precise measurement. ✅ – “The experiment was performed” instead of
✅ – mention diffusion, active transport, mitosis, natural selection, enzymes, cellular respiration, or photosynthesis depending on your topic.
Campbell, N. (2020). Biology 11 . Pearson. Lab handout, Enzyme Kinetics, Anytown High School. 3. Tips for a High Grade in Biology 11 Reports ✅ Use scientific language – not “I saw it turned blue” but “The solution exhibited a blue-black color indicating the presence of starch.” | | Photosynthesis | How does light color
Graph (described) : Bar graph showing fastest digestion at 37°C, activity dropping sharply after 50°C.
✅ – a negative control (no enzyme) and positive control (known active sample).
✅ – labeled axes (with units), a descriptive caption, and appropriate scale.
✅ – measurement precision, temperature fluctuation, contamination.
