Revision Quiz (by Mrs Rai)

Question 1

What are the 7 food groups?

Answer 1

1. Proteins
2. Fats
3. Carbohydrates
4. Vitamins
5. Minerals
6. Fibre
7. Water

Question 2

How would you test for starch?

Answer 2

Put a couple of drops of Iodine solution into a spotting tile with the substance that you are testing.

Question 3

What is the positive result for starch?

Answer 3

It will turn a blue/black colour

Question 4

What is the negative result for starch?

Answer 4

It will be an orange/brown colour

Question 5

How would you test for glucose (reducing sugar)?

Answer 5

Put the same amount of benedicts solution and the substance that is being tested into a boing tube and mix them together. Boil it in a water bath for approx. 10 mins.

Question 6

What is the positive result for starch?

Answer 6

The solution will be brick red.

Question 7

What is the negative result for starch?

Answer 7

It will be blue.

Question 8

From starch & glucose, which is a monosaccharide and which is a polysaccharide?

Answer 8

Starch = polysaccharide


Glucose = monosaccharide

Question 9

From starch and glucose, which is never found in animals?

Answer 9

Starch

Question 10

From starch and glucose, which is soluble in water?

Answer 10

Glucose

Question 11

What do we call 2 x glucose molecules joined together?

Answer 11

Maltose

Question 12

What is the name of the enzyme which digests maltose?

Answer 12

Maltase

Question 13

What is the name of the enzyme which digests starch?

Answer 13

Amylase

Question 14

Name 3 places where amylase is made in the digestive system

Answer 14

In your:
Mouth,
Pancreas,
Small intestine.

Question 15

Which part of the digestive system absorbs food?

Answer 15

The small intestine in the ileum

Question 16

Name 3 ways the small intestine is adapted to do its job?

Answer 16

3 of these:
Villi, 

Large surface area,

One cell thick,

Long,
Good blood supply.

Question 17

What are proteins made up of?

Answer 17

Amino acids

Question 18

What is the name of the enzyme which digests proteins?

Answer 18

Protease

Question 19

Name 3 places where protease is made in the digestive system.

Answer 19

Stomach,
Pancreas,
Small intestine.

Question 20

Name the enzyme which digests fats?

Answer 20

Lipase

Question 21

Where is bile made?

Answer 21

The liver

Question 22

Where is bile stored?

Answer 22

In the gall bladder

Question 23

What does bile do to fats?

Answer 23

Bile emulsifies fats and turns large droplets to small droplets to increase the surface area for enzymes to work. (NOT DIGESTION OF FATS)

Question 24

What does lipase digest fats into?

Answer 24

it splits it into fatty acids and glycerol.

Question 25

What is meant by a balanced diet?

Answer 25

A balanced diet is a diet that contains all the food groups in the correct proportions.

Question 26

What is protein needed for in the body?

Answer 26

Growth and repair of cells

Question 27

What happens if you don’t get enough:



(a) Vitamin C?

(b) vitamin D?


Answer 27

(a) Scurvy



(b) Rickets

Question 28

How do find the energy in food?

Answer 28

Burn the food in a calorimeter



Measure the temperature rise of the water.


Question 29

What units is energy measured in?

Answer 29

Joules or kilojoules

Question 30

Which 3 food groups are used by the body for energy?

Answer 30

Fats, Carbohydrates and Proteins

Question 31

Where does peristalsis occur?

Answer 31

All along the alimentary canal

Question 32

What happens in the stomach?

Answer 32

The food mixes with HCl to kill bacteria and give the correct pH for enzymes to work (pH 2). 

Proteases digest proteins.

Question 33


What happens in the large intestine?

Answer 33

Water is absorbed