A Level biology – Biuret test for proteins
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- Question 1 of 20
1. Question
What type of test is used to test for proteins?
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2. Question
What is the Biuret test used to detect?
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3. Question
Which type of bonds does the Biuret test detect?
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4. Question
What color indicates a positive result for the Biuret test?
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5. Question
The first step of the Biuret test involves adding an equal volume of which solution to the test tube containing the sample?
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6. Question
The second step of the Biuret test involves adding a few drops of which solution to the test tube and then mixing gently?
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7. Question
Which of the following conditions is the Biuret test carried out under?
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8. Question
Which ions present in the Biuret test reagents bind to nitrogens present in peptide bonds of proteins?
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9. Question
What do the Copper (II) ions present in the Biuret test reagents bind to in protein-containing samples to give a positive result?
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10. Question
What colour indicates no protein is present in the sample in the Biuret test?
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11. Question
To test for protein, a food sample must first be…
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12. Question
What can be used as an alternative to sodium hydroxide solution in the first step of the Biuret test?
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13. Question
Which of the following equpiment will not be needed to carry out the Biuret test?
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14. Question
Which of the following equipment will be needed to carry out the Biuret test?
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15. Question
Which of the following types of food would give a positive result with the Biuret test?
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16. Question
Which of the following types of food would give a negative result with the Biuret test?
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17. Question
Which of the following molecules would give a positive result with the Biuret test?
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18. Question
Which of the following would give a negative result with the Biuret test?
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19. Question
If present in a sample, which of the following would give a mauve/purple result with the Biuret test?
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20. Question
If present in a sample, which of the following would give a blue result with the Biuret test?
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