3) The Biuret Test for Proteins

Question 1

The biuret test can be used to test for proteins by detecting the presence of p__________ b___________.

Answer 1

peptide bonds

Question 2

Step 1

The sample is placed into a c________ t_________ t__________.

Answer 2

clean test tube

Question 3

Step 2

Biuret A (s________ h_________) is then added to the test tube.

Answer 3

sodium hydroxide

Question 4

Step 3

Add a few drop of B______ ___ (copper (II) sulphate) and mix gently.

Answer 4

Biuret B

Question 5

If protein is present then the colour of the r_________ will turn from b________ to p___________

Answer 5

reagent
blue
purple