Iodine Test - Monitoring Lesson

If you drop iodine solution on bread, it changes to blue-black. What does this show?

• Bread contains protein

• Bread contains sugar

• Bread contains starch

• Bread contains lipids?

When Starch is present, Iodine Solution turns...

• Clear

• Cloudy

• Blue-black

• Brown

What tests for starch?

• Benedict's Solution

• Iodine Solution

• Iodine

• Ethanol

A negative test for starch will cause Iodine to stay...

• brownish yellow

• brick red

• black

• blue-black

Which biomolecule turns iodine solution blue-black?

• complex carbohydrate (polysaccharide)

• protein

• simple carbohydrate (monosaccharide)

• lipid

Which reagent is used to test for complex carbohydrates (polysaccharides)?

• iodine solution
• biuret solution
• Benedict's solution
• Sudan III solution

Aaron used iodine to test a substance for starch. The color of the iodine placed on the substance was brown. What was the result of Aaron's test?

• The substance tested positive for starch.

• The substance tested negative for starch.

Simple carbohydrates are also known as

• starch

• sugar

• protein

• fat

When starch is completely broken down, it is converted to...

• Amino acids

• Fatty acids

• Glucose

• vitamins

Simple carbohydrates are also known as

• starch

• sugar

• protein

• fat