Exercise 2 Macromolecules

Benedict’s Reagent

Tests for reducing sugars. Color for positive results are green, orange, red, and brown.

Biuret’s Reagents

Tests for protein. Positive results are purple and negative results show no change in color.

Lugol’s Iodine

Tests for starch. Positive results are a blue-black color or purple and negative results show yellow.

Sudan IV

Tests for lipids. Positive results show a red/orange color with an insoluble layer and negative results are clear orange and no color change

Uncoated Paper Test

Tests for lipids. Positive results show a translucent stain and negative results show no stain.

Which Test required heating?

Benedicts Test

Which test indicates the presence of peptide bonds?

Biuret’s Test

What is the purpose of a control in each experiment?

To establish a baseline for comparison, ensuring that any changes in the experimental group are due to the independent variable.

Monosaccharide

A type of simple sugar that consists of a single sugar molecule, serving as a building block for more complex carbohydrates.

Polysaccharide

A carbohydrate composed of long chains of monosaccharide units, serving as energy storage or structural components in organisms.