Answer the following questions: a) Describe the steps to test for a certain food substance. i) Identify the food substance. ii) Suggest an alternative reagent. b) A student tested bread with iodine so

Here are the answers to questions 1 and 2:

Question 1:

a) In testing for a certain food substance in a sample, the following steps are required.
I - Pour a little of the sample into a test tube
II - Pour a little Benedict's solution into a test tube
III - Heat the test tube until content boils
IV - Brick - red precipitation appears

i) Which food substance could be tested for using the above steps?
The food substance tested for is reducing sugars.

ii) Which alternative reagent could be used in place of Benedict's solution?
An alternative reagent is Fehling's solution.

b) A student placed a few drops of iodine solution on a piece of bread

i) What observation is he likely to make?
The bread will turn blue-black.

ii) What conclusion could be drawn from the observation?
The conclusion is that starch is present in the bread.

c) State the functions of each of the following food substances

i) Vitamins: Regulate body processes, act as coenzymes, and maintain overall health.

ii) Proteins: Build and repair body tissues, produce enzymes and hormones, and *provide