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A student wants to test for protein - OCR Gateway - GCSE Biology - Question 10 - 2018 - Paper 1
Question 10
A student wants to test for protein. What would they use to test for protein? A. Benedict's reagent B. Biuret reagent C. Iodine solution D. Ethanol Your answer
Worked Solution & Example Answer:A student wants to test for protein - OCR Gateway - GCSE Biology - Question 10 - 2018 - Paper 1
Step 1
What would they use to test for protein?
Answer
To test for the presence of protein, the student would use Biuret reagent (Option B). This chemical test is specific for proteins due to the presence of peptide bonds. When Biuret reagent is added to a solution containing protein, it results in a color change, typically producing a violet color, which indicates the presence of peptide bonds. Other options listed, such as Benedict's reagent, are used for sugars, iodine solution for starch, and ethanol for testing for fats, making them inappropriate for protein testing.