Functional & Chemical Properties of Food - P1

Which is NOT an element that makes up Protein

• Oxygen

• Carbon

• Sulfate

• Hydrogen

Protein molecules are held together by....

• Food glue

• Chemical bonds

• Sodium bonds

• All of the above

Protein molecules are large molecules made up of (a)  

Denaturation is.....

• chemical bonds build up and protein molecules maintain their shape

• chemical bonds have broken down and protein molecules keep the same shape

• chemical bonds build up and protein molecules fold to change shape

• chemical bonds have broken and the protein molecules have unfolded and changed shape

Which of the following can cause denaturation?

Hint: There are more than 1 answer!

• Heat

• Freezing

• Air bubbles

• Emulsifying

An example of mechanical agitation is ......

• When frying an egg

• When adding lemon juice to cream

• When mechanically beating meat

• When whisking egg whites for meringue

Denatured protein molecules are....

• Smaller and take up more space than they used to

• Smaller and take up less space than they used to

• Larger and take up less space than they used to

• Larger and take up more space than they used to

Denatured protein molecules ________and ________with other ones to form big groups

• Unfold and join up

• Fold and join up

Emulsifier molecules have one end that likes water.

This is known as....

• Hydrophobic

• Hydrophilic

• Hydrotension

• Hydraulic

If you put oil and water in a jar then shook it up, the oil and water will mix together and form a cloudy looking liquid

• True

• False