Respiration

Question 1

What is respiration ?

Answer 1

a series of enzyme-controlled reactions which releases chemical energy from glucose

Question 2

How can measure the energy content of different food stuff? (apparatus)

Answer 2

Retort stand
boiling tube
seeker
thermometer 
Food sample (potato/fruit cereal)
30ml of water

Question 3

How can measure the energy content of different food stuff?(method)

Answer 3

Temperature of water before burning of food in the boiling tube was measured using a thermometer and was recorded in a result table.
A food sample was attached to a seeker and set alight using a Bunsen burner.
When the food sample had finished burning the temperature was recorded again. The experiment was repeated using different sample of food.

Question 4

Name 5 uses of energy for cellular processes?

Answer 4

Nerve impulse transmission
Muscle contraction 
Protein synthesis
Cell division 
Active transport

Question 5

What does ATP stand for?

Answer 5

Adenosine Tri Phosphate

Question 6

What is ATP made up of ?

Answer 6

1- adenosine

3- inorganic phosphate

Question 7

What are the 2 types of respiration ?

Answer 7

Aerobic

Anaerobic

Question 8

What is meant by aerobic?

Answer 8

requires oxygen

Question 9

What is meant by anaerobic?

Answer 9

no oxygen required

Question 10

How many stages does aerobic respiration occur in ?

Answer 10

2 stages

Question 11

How many molecules of ATP does aerobic respiration generate in total per molecule of glucose?

Answer 11

38ATP

Question 12

What is the equation for aerobic respiration?

Answer 12

glucose+oxygen —–> carbon dioxide+water(+38ATP)

Question 13

What is the organelle involved in aerobic respiration?

Answer 13

mitochondria

Question 14

What is stage 1 of aerobic respiration called?

Answer 14

glycolysis

Question 15

Where does glycolysis take place?

Answer 15

cytoplasm

Question 16

What does glycolysis not require?

Answer 16

doesn’t require oxygen

Question 17

How much ATP is generated during glycolysis?

Answer 17

2ATP

Question 18

What is the equation for glycolysis?

Answer 18

ADP+Pi 2ATP
\ /
glucose ——————————> pryruvate

Question 19

What is the second stage of aerobic respiration known as?

Answer 19

Kreb’s cycle

Question 20

Where does Kreb’s cycle take place?

Answer 20

mitochondria

Question 21

What is required for Kreb’s cycle?

Answer 21

Oxygen

Question 22

How much ATP is generated during Kreb’s cycle?

Answer 22

36ATP

Question 23

What is the equation for Kreb’s cycle?

Answer 23

36ADP+36Pi 36ATP
\ /
Pyruvate+oxygen————————>carbon dioxide+water

Question 24

What is the mitochondria?

Answer 24

the site of aerobic respiration

Question 25

What do cells that need a lots of energy have?

Answer 25

large number of mitochondria

Question 26

Give examples of cells that have a lots of mitochondria and need lots of energy? (3)

Answer 26

sperm
muscle
nerve

Question 27

What is the equation for anaerobic respiration in animals?

Answer 27

glucose—>pyruvate+2ATP—>lactic acid
\ /
occurs in cytoplasm

Question 28

What effect does a build up of lactic acid have on muscles?

Answer 28

makes them feel sore and fatique

Question 29

What is anaerobic respiration in yeast and plant cells known as?

Answer 29

fermentation

Question 30

What is the equation for fermentation?

Answer 30

glucose—>pyruvate+2ATP—>Ethanol+carbon dioxide
\ /
occurs in cytoplasm

Question 31

Why is a layer of oil placed over the yeast suspension?

Answer 31

to prevent it from reacting with oxygen

Question 32

Why do we need to put it in a glucose solution?

Answer 32

to provide a source of chemical energy for the yeast

Question 33

How do we show carbon dioxide is being given off?

Answer 33

turns lime water milky