Food Tests and The Digestive System

Question 1

What do you do to your food sample before a food test?

Answer 1

• Grind it in a mortar and pestle
• Place in beaker with distilled water
• Stir with glass rod until some is dissolved
• Filter with funnel lined with filtering paper into a test tube

Question 2

What test is the test for Sugars?

What is a positive result?

Answer 2

Benedict’s test

Solution goes Brick red

Question 3

What test is the test for Protein?

What is a positive result?

Answer 3

Biurent’s Reagent

Solution goes purple/mauve

Question 4

What test is the test for Starch?

What is a positive result?

Answer 4

Iodine test

Solution goes blue black

Question 5

What is the test for Lipids?

What is a positive result?

Answer 5

Ethanol and distilled water

A red layer on solution

Question 6

What do you need to prepare for the sugar test?

Answer 6

A water bath with temperatures above 75°C

Question 7

What enzyme breaks down lipids and what is it broken into to?

Answer 7

Enzyme - Lipase

3 fatty acids attached to a glycerol

Question 8

What enzyme breaks down proteins and what is it broken into to?

Answer 8

Enzyme - Protease

Amino acids

Question 9

What enzyme breaks down starch and what is it broken into to?

Answer 9

Enzyme - Amylase

Glucose

Question 10

Why does food need to be broken down by enzymes?

Answer 10

It is too big to fit into the bloodstream so has to be broken down