Biological Molecules - Nutrients & Enzymes

Which nutrient is our body's MAIN source of energy?

• Carbohydrates
• Fats
• Water
• Minerals

What is the basic unit of starch?

• glucose

• sucrose

• amino acids

• fatty acids

What are proteins made up of?

• glucose

• sucrose

• amino acids

• fatty acids

What are the two components that make up a fat molecule?

• amino acids & glucose

• fatty acids & glycerol

• water & sucrose

• fatty acids & amino acids

What are the elements that make up a protein molecule?

(You may select more than one answer.)

• carbon

• hydrogen

• oxygen

• nitrogen

Which of the following are monosaccharides?

(You may select more than one answer.)

• glucose

• fructose

• galactose

• maltose

Which of the following are polysaccharides?

(You may select more than one answer.)

• cellulose

• starch

• sucrose

• glycogen

Which of the following is not a reducing sugar?

• sucrose

• glucose

• maltose

• lactose

Benedict's solution is used to test for the presence of reducing sugars.

What colour change shows the presence of reducing sugars?

• blue to orange-red

• blue to purple

• orange-red to blue

• purple to blue

Name the reagent that is used to test for the presence of starch in a food sample.