B7 Digestion

Question 1

Name the body system shown on the diagram

Answer 1

Digestive system

Question 2

Name five organs found in the digestive system

Answer 2

Oesophagus
Stomach
Liver
Pancreas
Small intestine
Large intestine

Question 3

What is the purpose of the digestive system?

Answer 3

Breakdown food into small soluble molecules
Absorb digested food into blood

Question 4

Enzymes are biological catalyst.

What does this mean?

Answer 4

Biological - made in cells

Catalyst - Speed up chemical reactions

Question 5

Name the theory used to explain how enzymes work

Answer 5

Lock and key theory

Question 6

Name an enzyme that digests carbohydrates

Answer 6

Carbohydrase
or
Amylase

Question 7

Name the carbohydrase that breaks down starch

Answer 7

Amylase

Question 8

What is formed when starch is digested?

Answer 8

Simple sugar

or

Glucose

Question 9

Name the enzyme that digests protein.

Answer 9

Protease

Question 10

What is formed when proteins are digested?

Answer 10

Amino acids

Question 11

Name the enzyme that digests lipid

Answer 11

Lipase

Question 12

What is formed when lipids are digested?

Answer 12

Fatty acids

Glycerol

Question 13

Name the organ that makes bile.

Answer 13

Liver

Question 14

Where is bile stored?

Answer 14

Gall bladder

Question 15

What is the purpose of bile?

Answer 15

Neutralises hydrochloric acid released in the stomach.

Emulsifies lipid

(forms small droplets of fat to increase the surface area for digestion)

Question 16

Where is amylase made?

Answer 16

Salivary glands and pancreas

Question 17

Where is lipase made?

Answer 17

Pancreas

Wall of small intestine

Question 18

Which letter identifies the large intestine

Answer 18

D

Question 19

Where is protease made?

Answer 19

Stomach

Pancreas

Wall of small intestine

Question 20

Which letter identifies the small intestine

Answer 20

E

Question 21

Which letter identifies the oesophagus

Answer 21

B

Question 22

Which letter shows where bile is stored?

Answer 22

F

Question 23

In which parts of the digestive system is starch digested?

Answer 23

Mouth
Small intestine

Question 24

In which parts of the digestive system are proteins digested?

Answer 24

Stomach and small intestine

Question 25

In which part of the digestive system is lipid digested?

Answer 25

Small intestine

Question 26

Describe the biochemical test for starch

Answer 26

Add iodine solution Positive result - blue or black

Question 27

Describe the biochemical test for glucose

Answer 27

Add Benedict's solution Heat Positive result - green, yellow, orange, brick red

Question 28

Describe the biochemical test for protein

Answer 28

Add Biuret solution Positive result - lilac, purple or violet

Question 29

Describe the biochemical test for lipid

Answer 29

Add ethanol and mix gently Pour into cold water Positive result - white emulsion

Question 30

What happens to an enzyme when it is heated?

Answer 30

Denatures Changes shape and can no longer work

Question 31

What happens to an enzyme when it is placed in the wrong pH

Answer 31

Denatures Changes shape and can no longer work

Question 32

What is the function of the small intestine?

Answer 32

Digests food Absorbs the digested food into the bloodstream

Question 33

What is the function of the large intestine?

Answer 33

Absorbs water from undigested food, producing faeces.

Question 34

How does the shape of an enzyme affects its function?

Answer 34

Enzymes have a specific shape The active site is complementary to its substrate

Question 35

What is metabolism?

Answer 35

All the reactions in an organism

Question 36

How are the products of digestion used?

Answer 36

Respiration Build larger molecules

Question 37

Which letter identifies the liver?

Answer 37

A

Question 38

Which letter identifies the pancreas?

Answer 38

C

Question 39

Which letter identifies the stomach?

Answer 39

B

Question 40

The enzymes active site and substrate are complementary in shape. What does this mean?

Answer 40

Substrate fits into the active site