Diet

Question 1

What are the 7 nutrient groups?

Answer 1

“Carbohydrates
Proteins
Fats
Vitamins
Minerals
Water 
Fibre

Question 2

“How might the balanced diet of an office worker compare to a builder? Why?

Answer 2

The office worker will eat less carbohydrate than the builder as they are less active.

Question 3

Nutrient- starch
Test name- _____________
Method-add several drops of iodine solution to solid food or liquid
Result-_____________

Answer 3

Iodine Test

Orange-yellow to Blue-Black

Question 4

Nutrient- \_\_\_\_\_\_\_\_\_
Test name-Benedict’s Test
Method-•dissolve in water using a pestle and mortar 
•add to boiling tube
•add 2cm3 of Benedict’s solution 
•place in water bath for 2-3 minutes
Result-\_\_\_\_\_\_\_\_\_\_

Answer 4

Sugar

Blue to green to brick red

Question 5

Nutrient- \_\_\_\_\_\_\_\_\_
Test name-biuret Test
Method-•dissolve food in 1cm3 of water using a pestle and mortar
•add to a boiling tube
•add 1cm3 of dilute sodium hydroxide
•add 3 drops of copper sulphate 
•shake and watch
Result- \_\_\_\_\_\_\_

Answer 5

Protein

Pale blue to violet

Question 6

Nutrient- fat
Test name- _____________
Method-cut food into small pieces
Place in boiling tube
Add 3cm3 of ethanol
Shake and leave to settle
Have fill a 2nd test tube with water
Carefully add drops of solution from the 1st test tube of water.
You can also test for fat by rubbing a solid food on a grease proof peace of paper.
Result-_____________________________________________________

Answer 6

Emulsion Test/paper spot Test
Water will become cloudy - especially at the top of the test tube.

The fat will leave a translucent stain on the paper