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Worksheets

Food Tests

Total questions: 20

Worksheet time: 32mins

Name
Class
Date
1.

Which of the following tests for starch?

a)

Iodine

b)

Benedict's

c)

Biuret

d)

Emulsion

2.

Which of the following tests for protein?

a)

Iodine

b)

Benedicts

c)

Biuret

d)

Emulsion

3.

Which of the following tests for glucose?

a)

Iodine

b)

Benedicts

c)

Biuret

d)

Emulsion

4.

When starch is present iodine turns...

a)

purple

b)

blue-black

c)

orange

d)

brick red

5.

When protein is present Biuret turns...

a)

purple

b)

blue-black

c)

orange

d)

brick red

6.
When large amounts of glucose is present Benedicts turns...
a)
purple
b)
blue-black
c)
brick-red
d)
green
7.

A negative test for protein will cause Biuret to stay...

a)

brick red

b)

blue

c)

black

d)

orange

8.

A negative test for glucose will cause Benedicts to stay...

a)

brick red

b)

blue

c)

black

d)

orange

9.

What is a positive result for the lipid emulsion test?

a)

milky white colour

b)

clear

c)

yellow

d)

green

10.

In this experiment, you must put your test tubes into a hot water bath

a)

Benedict's Test

b)

Biurets Test

c)

Iodine Test

d)

Ethanol Emulsion Test

11.

The building blocks of proteins are

a)

carbohydrates

b)

amino acids

c)

sugars

d)

fatty acids

12.

This photo represents a

a)

negative test for glucose

b)

negative test for protein

c)

positive test for starch

d)

positive test for glucose

13.

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

a)

Benedict's with glucose

b)

Biuret with protein

c)

Iodine with starch

d)

Ethanol with fat

14.

The building blocks of lipids are

a)

Starches

b)

Fatty acids and Glycerol

c)

Sugars

d)

Amino Acids

15.

The building blocks of starch are

a)

glycerol

b)

amino acids

c)

sugars

d)

fatty acids

16.
Which biomolecule turns iodine solution black?
a)
complex carbohydrate (polysaccharide)
b)
protein
c)
simple carbohydrate (monosaccharide)
d)
lipid
17.
Which biomolecule does Benedict's solution test for?
a)
simple carbohydrate (monosaccharides)
b)
complex carbohydrates (polysaccharides)
c)
proteins
d)
lipids
18.
Which reagent is used to test for lipids?
a)
iodine solution
b)
Benedict's solution
c)
Biuret solution
d)
Sudan III solution
19.
Which biomolecule is this lab testing for?
a)
simple carbohydrate (monosaccharide)
b)
complex carbohydrate (polysaccharide)
c)
protein
d)
lipid
20.
Tara conducted several tests on a mystery solution.  Her results were as follows:
*Biuret's = purplish/violet; *Benedict's = orange;  *Sudan III = yellow; *Iodine = black.
Which biomolecules were present in the mystery solution?
a)
protein & carbohydrate
b)
protein & lipid
c)
carbohydrate & lipid
d)
protein, carbohydrate, & lipid