Biologjia - 11

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.

✅ – mention diffusion, active transport, mitosis, natural selection, enzymes, cellular respiration, or photosynthesis depending on your topic.

✅ – a negative control (no enzyme) and positive control (known active sample). biologjia 11

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.

Graph (described) : Bar graph showing fastest digestion at 37°C, activity dropping sharply after 50°C. Amylase is an enzyme that breaks down starch into maltose

✅ – “The experiment was performed” instead of “We did the experiment.”

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,

✅ – measurement precision, temperature fluctuation, contamination.

✅ – “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!

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.”

✅ – labeled axes (with units), a descriptive caption, and appropriate scale.