The Role Of Enzymes And Food Tests

Question 1

Why can enzymes be described as biological catalysts?

Answer 1

Because they are produced by living things

Question 2

What does it mean when an enzyme has been denatured?

Answer 2

The bonds holding the enzyme together break

this changes the shape of the enzymes active site

so the substrate what fit anymore

Question 3

List of the places where amylase is made in the human body

Answer 3

• The saliva Glands
• the pancreas
• the small testing

Question 4

What is the role of lipease?

Answer 4

Convert lipids into glycerol and fatty acid’s

Question 5

Where is ole stored?

Answer 5

Gall bladder

Question 6

What is a catalyst?

Answer 6

A catalyst is a substance which increases the speed of a reaction without being changed or used up in the reaction

Question 6

What are enzymes made up of?

Answer 6

Large proteins

and all proteins are made of chains of amino acid’s

these chains are folded into unique shapes

Question 7

What do enzymes do?

Answer 7

Speed up chemical reactions

Question 8

How do enzymes work?

Answer 8

The substrate fits into the active site

is the substrate doesn’t match the of the active site then the reaction would be catalysed

Question 9

What can be used to show enzyme action?

Answer 9

The lock and key model

Question 10

What do you enzymes need to catalyse properly?

Answer 10

The right pH and the right temperature

Question 11

What is the optimum temperature of an enzyme?

Answer 11

Where the enzyme is most active

Question 12

What do carbohydrases do?

Answer 12

Convert carbohydrates into simple sugars

Question 13

What do you proteases do?

Answer 13

Convert proteins into amino acid’s

Question 14

Where are proteases mate?

Answer 14

• The stomach
• the pancreas
• the small in testing

Question 15

What does Emily still?

Answer 15

Breaks down starch

Question 16

Where are lipids mate?

Answer 16

• The pancreas

- the Smalling testing

Question 17

What does Anneliese do?

Answer 17

Breaks down starch into maltose

Question 18

What does Bile do

Answer 18

Neutralises the stomach acid and emulsifies fats

Question 19

Where is bile produced?

Answer 19

In the liver

Question 20

Why does Beyerle break down fat?

Answer 20

To create a larger surface area for the enzyme of lipase to work

Question 21

Describe why buyer needs to have an alkaline pH

Answer 21

It neutralises the hydrochloric acid from the stomach

so enzymes can work

Question 22

In terms of enzymes ship explain why an enzyme only catalyse is one reaction

Answer 22

The enzyme has a specific shape which will only fit with one type of substrate

Question 23

Which enzymes digests starch

Answer 23

Amalase

Question 24

Which enzymes digests protein

Answer 24

Protease

Question 25

Which enzymes digests lipids

Answer 25

Lipase

Question 26

What are the products of digestions of starch

Answer 26

Sugars

Question 27

What are the products of digestions of proteins

Answer 27

Amino acids

Question 28

What are the products of digestions of light lipids

Answer 28

Glycerol and fatty acids

Question 29

Name the three parts of the digestive system that produces protease enzymes

Answer 29

Stomach

• pancreas
• small intestine

Question 30

Describe how you would prepare a food sample before testing it for the presence of different food molecules

Answer 30

Break up food using a postal or mortar

then transfer the ground at food into a beaker and add some distilled water

next stir the mixture with a glass rod and

finally feel to the solution using a flannel lined with filterpaper