For AS level OCR Biology, PAG 02 - reducing sugars experiment, what improvements can you suggest to the method you were given for this qualitative test?
Understand the Problem
The question is asking for suggestions to improve the method used in the qualitative test for reducing sugars as outlined in an OCR Biology AS level practical assessment. This involves evaluating the existing procedure and identifying potential enhancements for accuracy, reliability or efficiency.
Answer
Use a colorimeter for quantitative data and ensure consistent temperature during testing.
One improvement is to use a colorimeter to obtain quantitative results instead of relying solely on visual color change. Another is to ensure consistent temperature during the reactions to increase accuracy. Using test strips like Clinistix can also provide more precise results.
Answer for screen readers
One improvement is to use a colorimeter to obtain quantitative results instead of relying solely on visual color change. Another is to ensure consistent temperature during the reactions to increase accuracy. Using test strips like Clinistix can also provide more precise results.
More Information
A colorimeter helps provide numerical values, reducing subjective assessment errors. Consistent temperature prevents variability in color change, ensuring more reliable results.
Tips
A common mistake is relying too much on visual assessments, which can be subjective and inaccurate.
Sources
- AS Biology help - The Student Room - thestudentroom.co.uk
- Biology Practical Skills Handbook - OCR - ocr.org.uk
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