nutrition

Question 1

describe beneditcs test for glucose

Answer 1

1. prepare a food sample and transfer 5cm(cubed) to a test tube.
2. prepare a water bath thats set to 75C.
3. add some benedits test to the test tube using a pippette.

4.place test tube in water bath and leave it for 5 mins

5. if it contains glucose it will change from its normal blue color. it will become green or yellow in LOW CONCENTRATIONS of glucose. or red in HIGH

Question 2

describe iodine solution for starch

Answer 2

1. make a food sample and transfer 5cm(cubed) to a test tube
2. then add a few drops of iodine and gently shake
3. if it contains starch it will turn from browny- orange to black or blue-black

Question 3

describe biuret test for protein

Answer 3

1. prepare a sample of your food and transfer 2cm(cubed) to a test tube
2. add 2cm(cubed) of briuet solution and gently shake
3. if no protein is present, itll stay blue
   if it does itll turn pink or purple

Question 4

describe the sudan III test for lipids

Answer 4

1. prepare a sample of food and transfer about 5cm(cubed)
2. use a pippette to add 3 drops of sudan III solution and gently shake
3. if it contains lipids the mixture will seperate and the top layer will be bright red. if it doesnt nothing will happen