B1.3

Question 1

What is Metabolic rate?

Answer 1

The speed at which chemical reactions transfer energy from its chemical stores in food.

Question 2

Higher the metabolic rate…

Answer 2

The more food you need to eat

Question 3

What do carbs do?

Answer 3

Provide energy to move and stay alive

Question 4

What do proteins do?

Answer 4

Allow Growth and repair of body tissue

Question 5

What do lipids do?

Answer 5

They are a good store of energy

Question 6

What are carbohydrates?

Answer 6

Biological polymers

Question 7

What enzyme breaks down carbs?

Answer 7

Carbohydrase

Question 8

What are carbohydrates made from

Answer 8

-Carbon,hydrogen and oxygen
- they are lots of sugar molecules

Question 9

What is a protein?

Answer 9

A polymer

Question 10

How many amino acids is needed to make a protein?

Answer 10

20

Question 11

What are proteins made from

Answer 11

An amino acid chain ordered specifically

Question 12

What enzyme breaks down protein?

Answer 12

Protease

Question 13

What are lipids?

Answer 13

Lipids are the fats and oils we eat

Question 14

What are lipids synthesised from?

Answer 14

3 fatty acids and a glycerol molecule

Question 15

What enzyme breaks down lipids?

Answer 15

Lipase

Question 16

What enzyme breaks down starch?

Answer 16

Amylase

Question 17

What is cellular respiration?

Answer 17

• an EXOTHERMIC reaction
• a continually occurring and universal process

Question 18

What is aerobic respiration?

Answer 18

Aerobic respiration is a process that occurs in the presence of oxygen and involves the breakdown of glucose into carbon dioxide and water, with the release of energy that is used to produce ATP.

Question 19

Formula for aerobic respiration?

Answer 19

Glucose + oxygen -> carbon dioxide + water (+ATP)

Question 20

Where do you get the oxygen needed?

Answer 20

From the air you breathe

Question 21

What is ATP?

Answer 21

• ATP (adenosine triphosphate) is the energy-carrying molecule used in cells because it can release energy very quickly.
• energy store

Question 22

What happens In aerobic respiration? (With atp)

Answer 22

The reaction transfers energy from its energy store in glucose to another energy store which is ATP

Question 23

How is ATP used?

Answer 23

• for movement - animals use it to contract muscle cells enabling the organism to move
• to stay warm - when an animal’s surroundings are colder than they are, they increase their rate of respiration. This transfers more energy by heating
• To synthesise larger molecules from smaller ones to make new cell material.

Question 24

Where does aerobic respiration occur?

Answer 24

In the mitochondria

Question 25

What kind of reaction is aerobic respiration?

Answer 25

An enzyme-controlled reaction

Question 26

Is aerobic respiration endothermic or exothermic?

Answer 26

Exothermic

Question 27

Why is aerobic respiration Exothermic?

Answer 27

Because it transfers energy to the surroundings by heating

Question 28

How do you respire without oxygen?

Answer 28

Your body starts to transfer energy from its chemical store in glucose by anaerobic respiration. This series of chemical reactions does not need oxygen. It allows the body to transfer extra energy for short periods of time.

Question 29

When does anaerobic respiration normally take place?

Answer 29

During strenuous exercise - IT IS LIMITED

Question 30

Formula for anaerobic respiration

Answer 30

Glucose -> lactic acid

Question 31

How does the energy released from anaerobic respiration compare to aerobic respiration?

Answer 31

Anaerobic respiration occurs without oxygen and releases less energy but more quickly.

Question 32

Is lactic acid good for you?

Answer 32

No it is poisonous and causes cramp and fatigue when it builds up

Question 33

What is oxygen debt?

Answer 33

After exercise you breathe heavily - it is the extra oxygen you inhale needed to break the lactic acid down

Question 34

What kind of respiration produces more atp?

Answer 34

Aerobic reposration

Question 35

What is the word equation for anaerobic respitation in plants and microorganisms?

Answer 35

Glucose -> ethanol + carbon dioxide

Question 36

What is anaerobic respiration in plants and micro organisms called?

Answer 36

Fermentation

Question 37

Products of fermentation?

Answer 37

- ethanol - carbon dioxide

Question 38

What does this reaction do?

Answer 38

Transfers energy from its store in glucose