Free Printable Biomolecule Mysteries

Worksheets

Biomolecule Mysteries

Total questions: 10

Worksheet time: 50mins

Name

Class

Date

Which test would you perform on bread to test for starch?

biuret

Benedict's

Sudan III

iodine

Helena and Carrie were having a healthy debate about whether nuts contain lipids. Carrie said if you tested with Sudan III you could PROVE they contained lipids, Helena said you should test with iodine. Who is correct?

Carrie: Sultan III would turn red if lipids were present

Carrie: Sultan III would turn blue/black if lipids were present

Helena: iodine would turn blue/black if lipids were present

Helena: iodine would turn red if lipids were present

Nila tested a mystery substance by adding Benedict's solution and warming it in a hot water-bath for 2 minutes. The Benedict's turned an orange color. What biomolecule was present?

starch

glucose

protein

oil

Which TWO tests would be positive if an egg muffin was tested (one for the egg, one for the muffin)?

iodine & biuret

iodine & Benedict's

biuret & Benedict's

Benedict's & Sudan III

Which test is positive when the reagent turns from brown to blue/black?

test for proteins

test for lipids

test for complex carbohydrates (polysaccharides)

test for simple carbohydrates (monosaccharides)

What is this test?

Biuret's testing for lipids

Sudan III testing for lipids

Benedict's testing for lipids

Iodine testing for lipids

Bill and Ben tested a substance, which tested positive with iodine and negative with Benedict's solution. Ben said the substance was a carbohydrate, Bill said it wasn't. Who is correct?

Bill: if it was a carbohydrate it would have tested positive with Benedict's

Bill: if it was a carbohydrate it would have tested negative with iodine

Ben: iodine only tests for one type of carbohydrate, not all types

Ben: if Benedict's tests negative then a carbohydrate is present

Proteins are tested for by using....

Benedict's solution

Biuret solution

Iodine solution

Sudan III solution

If you wanted to test for proteins in a steak, which test would you do?

Biuret test

Benedict's solution test

Sudan III test

Iodine test

10.

Which TWO tests would test positive with bread and oil?

Biuret's & Sudan III

Benedict's & Iodine

Iodine & Sudan III

Biuret's & Benedict's

Reset

Biomolecule Mysteries

Total questions: 10

Worksheet time: 50mins

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