Page 30 - Biology Form Two

Biology for Secondary Schools

Prevention of Anorexia nervosa and such as iodine solution, Benedict’s
Bulimia nervosa solution, Sudan III reagent, copper (II)
Anorexia and Bulimia can be sulphate solution, hydrochloric acid, and
prevented by resolving the underlying sodium hydroxide solution. Experiments
psychological problems and seeing a conducted to identify properties of food
Visit a nearby health centre. READING ONLY
medical practitioner who can prescribe
a way of getting back to one’s health. nutrients are known as food tests.
They can also be prevented by adhering Food tests
to the necessary lifestyle and dietary Food tests are used to determine which
changes. nutrients are present in a food substance.

Activity 1.3: Investigate nutritional At this level, you will learn how to test
deficiencies and disorders for carbohydrates, proteins and lipids.

Materials When doing a food test, consider the
Notebook, pen and charts showing following: the food to be tested, required
various nutritional deficiencies and materials, procedure, observation, and
disorders conclusion. For the report to be simple

FOR ONLINE
Procedure and easy to understand, use a table
1. with four columns. It consists of the
following headings: Food sample tested,
2. Ask a health personnel or a dietician Procedure, Observation and Inference,
about the nutritional deficiencies as Table 1.4 shows.

and disorders that are common in
the area. Table 1.4: Food testing summary

3. Discuss with the health personnel Food
on the reasons for their prevalence sample Procedure Observation Inference
and how they can be prevented. tested

4. Write short notes on what you have
discussed.

Food sample tested: The food tested can
Properties of food nutrients
Food nutrients have various properties be reducing sugar, non-reducing sugar,
that help to distinguish them. Such starch, lipids or protein. Most substances

properties can be determined using are mixed with water to make a solution
various laboratory reagents and chemicals or a mixture before testing. They can

24 Student’s Book - Form Two

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