B1.3: Respiration

Question 1

Is cellular respiration exothermic or endothermic?

Answer 1

Exothermic

Question 2

When does cellular respirationn occur?

Answer 2

Continuously in living cells, supplying ATP in all living cells

Question 3

Why do organisms need energy?

Answer 3

• to drive chemical reactions in an organism
• movement
• cell division
• homeostasis

Question 4

When does aerobic respiration take place

Answer 4

All the time

Question 5

Where does aerobic respiration take place

Answer 5

Mitochondria

Question 6

Why do different cells have different numbers of mitochondria?

Answer 6

Muscle and liver cells have more because they need more energy

Question 7

What does aerobic respiration use?

Answer 7

Oxygen

Question 8

What is the word equation of aerobic respiration?

Answer 8

Glucose + oxygen —> carbon dioxide + water

Question 9

What is the balanced symbol equation of aerobic respiration?

Answer 9

C6H12O6 + 6O2 —> 6CO2 + 6H2O

Question 10

What happens in anaerobic respiration?

Answer 10

Orgnisms and tissues resppiring without oxygen
Faster but less efficient than aerobic respiration

Question 11

Where does anaerobic respiration take place?

Answer 11

Cytoplasm

Question 12

When does anaerobic respiration occur?

Answer 12

During vigorous excercise: not enough oxygen intake

Question 13

What is the word equation of anaerobic respiration?

Answer 13

Glucose —> lactic acid

Question 14

What is the balanced symbol equation of anaerobic respiration?

Answer 14

C6H12O6 —> 2C3H6O3

Question 15

What is anaerobic respiration in yeast called?

Answer 15

Fermentation

Question 16

Why is fermentation important?

Answer 16

Making bread
Making alcohol

Question 17

What is the word equation of fermentation?

Answer 17

Glucose —> carbon dioxide + ethanol

Question 18

What is the balanced symbol equation of fermentation?

Answer 18

C6H12O6 —> 2C2H5OH + 2CO2

Question 19

What is the use of carbohydrates?

Answer 19

Provide energy to move and stay alive

Question 20

What is the use of proteins?

Answer 20

Growth and repair of body tissue

Question 21

What is the use of lipids?

Answer 21

Good store of energy

Question 22

What is metabolic rate?

Answer 22

The rate at which the body uses energy

Question 23

Starch is a polymer formed from what monomers?

Answer 23

Glucose monomers, found in plants as energy store

Question 24

Glycogen is a polymer, of what monomers?

Answer 24

Glucose, found in animals as an energy reserve

Question 25

What are the monomers of protein?

Answer 25

Amino acids

Question 26

Which enzyme breaks down proteins?

Answer 26

Protease

Question 27

What are lipids?

Answer 27

Fats and oils

Question 28

What are the monomers of lipids?

Answer 28

3 fatty acid molecules 1 glycerol molecules

Question 29

Which enzyme breaks down lipids?

Answer 29

Lipase

Question 30

What is the independant variable?

Answer 30

The variable that is altered

Question 31

What is the dependant variable?

Answer 31

The variable that is measure

Answer 32

The variable that is measured

Question 33

What is the control variable?

Answer 33

The variable kept the same