B1 - Food Tests And Enzymes

Question 1

What is the name of the chemical used to test for starch?

Answer 1

Iodine solution

Question 2

What colour indicates a positive test for starch using iodine solution?

Answer 2

Blue / black

Question 3

What chemical is used to test for sugar?

Answer 3

Benedicts

Question 4

What colour indicates a positive test for sugar?

Answer 4

Brick red

Question 5

What chemical is used to test for protein?

Answer 5

Biuret

Question 6

What colour indicates a positive test for protein?

Answer 6

Lilac

Question 7

Name the enzyme which breaks down starch

Answer 7

Amylase

Question 8

Enzymes are often called

Answer 8

Biological catalyst

Question 9

If an enzyme is denatured, the active site on the enzyme changes shape so that…

Answer 9

The substrate cannot bind

Question 10

Name the enzyme which breaks down protein

Answer 10

Protease

Question 11

What does the ‘optimum pH’ mean?

Answer 11

The pH where the rate of reaction is the fastest

Question 12

Name the enzyme which breaks down fats

Answer 12

Lipase

Question 13

During a reaction, an enzyme will break down the substrate to form…..

Answer 13

Products

Question 14

What are lipids digested into?

Answer 14

Fatty acids and glycerol

Question 15

What is starch broken down into?

Answer 15

Glucose

Question 16

What is the product(s) of protein digestion?

Answer 16

Amino acids

Question 17

An enzyme will bind to a substrate to form ….

Answer 17

Enzyme-substrate complex

Question 18

What happens to enzymes when they get too hot?

Answer 18

The active site changes shape and becomes denatured

Question 19

Name the region that a substrate binds to.

Answer 19

Active site

Question 20

What is an enzyme made out of?

Answer 20

Protein