Everything Life Sciences Grade 10

Figure 2.12: Test for reducing sugars using Benedict’s test

Results:

Construct a table to record the results of this experiment. It is important to observe and

record any changes that have taken place.

Tube number Observations in

each tube

Questions:

1. What colour changes (if any) did you observe after heating the samples with Benedict’s
   solution?


2. The three solutions tested are examples of the chemical substances found in cells:
   glucose, starch, protein (albumen). Which of the samples tested positive when the
   Benedict’s solution was added and the test tube was heated?


3. Other than the colour, what change took place in the consistency of the Benedict’s
   solution?


4. What can you conclude from the investigation?


5. Why was water included in test tube 4?

Lipids DUMMY

Molecular make-up

Chapter 2. The chemistry of life 35