This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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You're on a roll — 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