Food Tests

Nutrition: Review & Food Tests

In this session you will review you basic understanding of roles of macro and micronutrients and you will be able to identify the various tests used to determine the presence of specific food substances.

Let's Review what you already know,

Multiple Choice

Which of the following nutrients provides energy to the body?

• carbohydrates

• vitamins

• water

• minerals

Multiple Choice

Which of the following nutrients is important for body, cell and muscle growth and repair?

• vitamins

• fats

• proteins

• carbohydrates

Multiple Choice

Which nutrient supplies the most energy per gram?

• carbohydrates

• fats

• protein

• water

Multiple Choice

What are the 6 nutrients?

• carbs, meats, fibers, water, protein, dairy

• carbs, fats, fibers, cheese, protein, and vegetables

• fruits, milk, fibers, water, pork and vitamins

• carbs, fats, minerals, water, proteins and vitamins

Multiple Select

Which of the followign two statements define a macro and a micro nutrient?

• a macro nutrient is a nutrient needed in large quantities.

• A micro nutrient is a nutrient needed in large quantities

• a macro nutrient is a nutrient needed in small quantities

• a micro nutrient is a nutrient needed in small quantities

Multiple Choice

Which food group does glucose and starch belong to?

• fats

• Vitamins

• proteins

• carbohydrates

Multiple Choice

The building blocks of starch are

• glycerol

• amino acids

• sugars

• fatty acids

Multiple Choice

The building blocks of lipids are

• Starches

• Fatty acids and Glycerol

• Sugars

• Amino Acids

Multiple Choice

True or False. All cholesterol is bad for you.

• True

• False

Multiple Choice

The role of fibre is to

• Strengthen teeth and bones

• Keep the digestive system healthy

• Provides the body with energy

• Repairs muscle and tissues

Multiple Choice

This nutrient makes up 75% of your body:

• water
• vitamin A
• carbohydrates 
• protein 

Multiple Choice

Ashley is getting ready for her soccer game.  Which nutrient will give her body the main fuel for her game? 

• Fat
• Water
• Multi-vitamin
• Carbohydrates

Multiple Choice

To stay healthy, you should know:

• How to make food for your family.
• Your serving sizes and food groups.
• That you should eat whenever you are hungry.

Multiple Choice

Which of the following is an example of a healthy snack?

• chips
• pop tart
• banana
• doughnut

Multiple Choice

The amount of energy released when nutrients are broken down is measured in units called

• grams
• calories
• ounces
• pounds

Multiple Choice

Organic compounds that control several body functions. e.g. A, C, K

• Carbohydrates
• Metabolism
• Vitamins
• Digestion

Watch the following videos

You must watch the videos in the following slides and take note of the procedures involved in testing for the various food substances:

(1) Reducing and Non- Reducing Sugars

(2) Fats

(3) Proteins

(4) Starch

Testing for Reducing and Non- Reducing Sugars

Testing for Glucose

Testing for Starch

Testing for fat

Testing for fat

Grease Sport Test

Testing for Protein

Let's summarize

Let's Review

Multiple Choice

Which chemicals did you mix to test for proteins - biuret test?

• Ethanol and water

• Iodine and potassium permanganate

• Benedicts Solution

• Sodium Hydroxide and Copper Sulphate

Multiple Choice

How do you test for lipids?

• By using Ethanol and water

• By using Benedicts solution

• By using Iodine

• By using Biuret test

Multiple Choice

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?

• protein & carbohydrate

• protein & lipid

• carbohydrate & lipid

• protein, carbohydrate, & lipid

Multiple Choice

Which biomolecule does Benedict's solution test for?

• simple carbohydrate (monosaccharides)

• complex carbohydrates (polysaccharides)

• proteins

• lipids

Multiple Choice

Which biomolecule turns iodine solution black?

• complex carbohydrate (polysaccharide)

• protein

• simple carbohydrate (monosaccharide)

• lipid

Multiple Choice

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

Multiple Choice

This photo represents a

• negative test for glucose

• negative test for protein

• positive test for starch

• positive test for glucose

Multiple Choice

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

• Benedict's Test

• Biurets Test

• Iodine Test

• Ethanol Emulsion Test

Multiple Choice

What is a positive result for the lipid emulsion test?

• milky white colour

• clear

• yellow

• green

Multiple Choice

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

• brick red

• blue

• black

• orange

Multiple Choice

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

• brick red

• blue

• black

• orange

Multiple Choice

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

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

Multiple Choice

When protein is present Biuret turns...

• purple

• blue-black

• orange

• brick red

Multiple Choice

When starch is present iodine turns...

• purple

• blue-black

• orange

• brick red

Multiple Choice

Which of the following tests for glucose?

• Iodine

• Benedicts

• Biuret

• Emulsion

Multiple Choice

Which of the following tests for protein?

• Iodine

• Benedicts

• Biuret

• Emulsion

Multiple Choice

Which of the following tests for starch?

• Iodine

• Benedict's

• Biuret

• Emulsion