BI-674
Digestive enzymes
Biology · Secondary 3 · Hard · Digestive enzymes
Three test tubes each contain 2 cm³ of egg white (protein). Different enzymes are added and the mixtures are kept at 37°C for 30 minutes.
Tube 1: water only
Tube 2: protease
Tube 3: protease that has been boiled
After 30 minutes, a sample from each tube is tested with biuret solution. Which row shows the expected colour in each tube?
Tube 1: water only
Tube 2: protease
Tube 3: protease that has been boiled
After 30 minutes, a sample from each tube is tested with biuret solution. Which row shows the expected colour in each tube?
- Tube 1 violet, Tube 2 blue, Tube 3 violet
- Tube 1 blue, Tube 2 violet, Tube 3 violet
- Tube 1 violet, Tube 2 violet, Tube 3 blue
- Tube 1 blue, Tube 2 blue, Tube 3 violet
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