Question

3
Answer the following questions.
1. Describe how protein is tested in food.
2. How does taproot and fibrous root differ from each other? Give one-one example of
each.
3. Identify the components present in the material based on the following results or
conclusions.
(a) Cut the raw potato and apply two to three drops on it - shows blue black
colour.
(b) Wrap the ground nut seed in paper and crush it carefully, oily patch can be
seen on paper.​

Answer 1

Explanation:

1 The presence of protein is tested by the Biuret test for proteins. The Biurette reagent made of sodium hydroxide and copper (II) sulphate helps in determining the presence of protein in a sample

2 A tap root system has a single main root that grows down. A fibrous root system forms a dense network of roots that is closer to the soil surface. An example of a tap root system is a carrot. Grasses such as wheat, rice, and corn are examples of fibrous root systems

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