BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Biuret solution is used to test for protein. It is royal blue initially and changes to violet when it reacts with protein. Brown paper bags are used to test for lipids. The paper bag becomes translucent (allows light to pass through) in the presence of lipids.

Detailed explanation-2: -A complete cholesterol test-also called a lipid panel or lipid profile-is a blood test that can measure the amount of cholesterol and triglycerides in your blood.

Detailed explanation-3: -For PTT-ISA, a woman holds a trifold brown paper towel against her perineum while coughing hard three times. She checks the towel for wetness and compares it with pictorial showing wetted area gradations (dry towel through >6 ml/saturated).

Detailed explanation-4: -Rub the food sample on filter paper and then hold the filter paper up to the light. If the paper is translucent (slightly see-through) there was fat present in the food. Don’t try this with watery foods-the water will make the paper translucent and you’ll get a false positive.