A student wants to determine whether a sample of food contains lipids.
Describe the test the student should carry out and include the positive result.
Describe how the student could determine the concentration of the lipid in the sample.
State one health and safety precaution the student should take when using the reagent to test for a lipid.
Fig. 1 shows the structure of a lipid, also known as a triglyceride.
Fig. 1
Lipids cannot cross the cell-surface membranes of cells lining the gut during the absorption of nutrients.
Suggest why it cannot cross cell-surface membranes.
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