21. How can you test the presence of sugar in a food item? Explain the process.
22. A)Why do we need to include proper amount of water in our diet? Give two points
B) Why do we need to include proper amount of roughage in our diet? Give one
point
Answers
Answer:
21.Step 1
Turn on your hot plate to medium heat and place your beaker filled with 100 mL of water on it. Bring it to a boil.
Step 2
Pour 4 mL of your food sample in a test tube if it is liquid based. If you are testing a solid food, you can use a food processor to puree it by adding a small amount of water or crush the item into a powder using a mortar and pestle. Add water to the powder and pour it in the test tube.
Step 3
Add approximately 1 mL of Benedict's solution to the test tube using a dropper. Slowly swirl the test tube counterclockwise to distribute the reagent evenly.
Step 4
Place your test tube into the beaker until you note a color change -- this process usually takes five minutes.
Step 5
Examine the color change, if it is present. Benedict's reagent has a color change gradient from blue, meaning no simple sugars are present, to green, yellow, orange, red and brown. The color sequence indicates the increasing concentration of the simple sugar, with green being the lowest and brown being the highest.
Things You'll Need
Benedict’s reagent
Beaker
Test tubes and holder
Graduated cyclinder
Food samples
Food processor
Water
Hot plate
Mortar and pestle
Dropper
22.A) 1.Improve physical performance.
2.Help you to lose weight.
3.Boost your mood.
4.Boost your brainpower.
5.Prevent headaches
6.Protect against disease.
B)The portion of our food that do not provide any nutrient to the body but help in maintaining a healthy digestive system is called roughage or dietary fibre. It is the fibre (cellulose) present in the food.
Roughage it is necessary for the proper digestion of food. It prevents constipation and ensure proper bowel movement. Lack of fibre in the diet causes the stool to become hard and difficult to pass out. This condition is called constipation.It helps to move the undigested food out of the body.
this is answer for your question
hope it helps you
Hello friend.
Step 1
Turn on your hot plate to medium heat and place your beaker filled with 100 mL of water on it. Bring it to a boil.
Step 2
Pour 4 mL of your food sample in a test tube if it is liquid based. If you are testing a solid food, you can use a food processor to puree it by adding a small amount of water or crush the item into a powder using a mortar and pestle. Add water to the powder and pour it in the test tube.
Step 3
Add approximately 1 mL of Benedict's solution to the test tube using a dropper. Slowly swirl the test tube counterclockwise to distribute the reagent evenly.
Step 4
Place your test tube into the beaker until you note a color change -- this process usually takes five minutes.
Step 5
Examine the color change, if it is present. Benedict's reagent has a color change gradient from blue, meaning no simple sugars are present, to green, yellow, orange, red and brown. The color sequence indicates the increasing concentration of the simple sugar, with green being the lowest and brown being the highest