Y10 Combined Science Unit 3 Quiz

I am used to test for the presence of complex carbohydrates (starch)

• Benedict's Test

• Biuret Test

• Iodine Test

• Ethanol Emulsion Test

I am used to test for the presence of simple carbohydrates (sugars)

• Benedict's Test

• Biuret Test

• Iodine Test

• Ethanol Emulsion Test

I am used to test for the presence of protein

• Benedict's Test

• Biuret Test

• Iodine Test

• Ethanol Emulsion Test

When starch is present iodine turns...

• purple

• blue-black

• orange

• brick red

When protein is present Biuret turns...

• purple

• blue-black

• orange

• brick red

When large amounts of glucose is present Benedicts turns...

• purple
• blue-black
• brick-red
• green

What is a positive result for the lipid emulsion test?

• milky white colour

• clear

• yellow

• green

The building blocks of proteins are

• carbohydrates

• amino acids

• sugars

• fatty acids

This photo represents a

• negative test for glucose

• negative test for protein

• positive test for starch

• positive test for glucose

The test tubes in the photo represent a negative and positive result for

• Benedict's with glucose

• Biuret with protein

• Iodine with starch

• Ethanol with fat