Question

question answer
1.how is the presence of protein tested in a food sample?
2.how. are the scavengers useful for the enviorment?Name the water soluable and fats soluable protein?​

Answer 1

Answer:

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Answer 2

Answer:

1.The presence of proteins in given foodstuff can be tested as follows:

Method 1: To test protein in the food we need a solution of copper sulfate and caustic soda.

- First we grinded the food sample finely (for example almonds).

- Then, we put it in a clean test tube followed by the addition of 10 drops of water.

- Added 2 drops of copper sulfate solution and shook it well.

- Added 10 drops of caustic soda solution and shook it well.

- The Violet color indicates the presence of proteins.

Method 2: Biuret test –

- First we added the given sample food.

- We then added aqueous copper sulfate.

- The violet coloration confirms the presence of protein.

Method 3: Xanthoproteic test –

- First we added the given sample food.

- We then added the nitric acid.

- The yellow color solution confirms the presence of proteins.

Method 4: Millions test –

- First we added the given sample food.

- We then added the mercuric sulfate in the presence of sodium nitrite and sulfuric acid.

- The brick red color solution confirms the presence of proteins.

Method 5: Ninhydrin test –

- First we added the given sample food.

- We then added the pyridine solution of ninhydrin

- A Violet color solution confirms the presence of proteins.

2. refer internet

Explanation: