If you are a Cambridge A-Level Biology student, you know the drill. You walk into the lab, see the unfamiliar specimens, the mysterious solution "X," and a ruler that somehow feels intimidating.
You will not calculate these by hand in Paper 5, but you must know which test to use and why . biology 9700 practical notes
: Benedict’s solution + heat (80–100°C) → Blue to Brick Red. : Iodine solution → Brown to Blue-Black. : Biuret reagent → Blue to Purple/Violet. 2. The Art of Biological Drawing (Q2) If you are a Cambridge A-Level Biology student,
Join points with straight lines (ruled) unless a "best-fit" line is specifically requested. Circle outliers if they are clearly anomalous. ⚠️ Identifying Variables and Errors You will be asked to critique your experiment. Be specific. see the unfamiliar specimens