Digestion, Enzymes and Food Tests

Where are most food molecules absorbed?

• Large intestine

• Liver

• Small intestine

• Stomach

Name the enzyme that digests starch in the human digestive system.

• lipase
• protease
• amylase

Which organ in Figure 1 produces acid?

• A

• B

• C

• D

• E

Which organ in Figure 1 produces bile?

• A

• B

• C

• D

• E

Where in Figure 1 are digested foods absorbed into the blood?

• A

• B

• C

• D

• E

Food molecules like proteins cannot be absorbed unless digested because they are too ___.

Match the following enzyme with the molecules they break down

• Proteins

• Amylase

• Fats

• Lipase

• Starch

• Protease

Match the nutrients with what they are broken down into

• Glucose

• Proteins

• Fatty Acids and glycerol

• Fats

• Amino Acids

• Starch

Match the reagent with the nutrient it can be used to test for.

• Reducing sugars

• Iodine solution

• Proteins

• Ethanol

• Fats

• Benedicts Solution

• Starch

• Biuret reagent

Match the reagent with the correct colour change

• Colourless - Cloudy White

• Benedict's Solution

• Blue - Brick red

• Biuret Solution

• Blue - Purple

• Ethanol

• Orange - Blue/black

• Iodine Solution