B4 (biology) (booklet)

Question 1

Name the 2 reactants in photosynthesis?

Answer 1

Carbon dioxide
Water

Question 2

Name 2 products formed in photosynthesis

Answer 2

Oxygen
Glucose

Question 3

Write the word equation for photosynthesis

Answer 3

Carbon dioxide + water → oxygen + glucose

Question 4

Write the symbol equation for photosynthesis

Answer 4

CO2+H2O →O2+C6H12O6

Question 5

Describe what happens to the rate of photosynthesis as temperature increases

Answer 5

Rate of photosynthesis increases and then decreases

Question 6

Describe what happens to the rate of photosynthesis as Light intensity increases

Answer 6

Rate of photosynthesis increases and then remains constant

Question 7

State 3 limiting factors for photosynthesis

Answer 7

Light
Chlorophyll
Carbon dioxide

Question 8

Name the plant used to investigate the effect of different factors on rate of photosynthesis

Answer 8

Elodea (pondweed)

Question 9

How do you calculate the rate of photosynthesis of an aquatic plant?

Answer 9

Count the number of O2 bubbles produced in a minute

Question 10

How can you more accurately, calculate the rate of photosynthesis of an aquatic plant?

Answer 10

Record volume of gas produced using a gas syringe

Question 11

Which cells are adapted for increased photosynthesis?

Answer 11

Palisade cells

Question 12

How are palisade cells adapted for increased rates of photosynthesis?

Answer 12

Lots of chloroplast and chlorophyll

Question 13

Describe what happens to the rate of photosynthesis as carbon dioxide increases

Answer 13

The rate of photosynthesis increases, and then remains constant

Question 14

State three limiting factors for photosynthesis

Answer 14

carbon dioxide concentration
Temperature
Light intensity

Question 15

In a variegated leaf, why do some parts appear white?

Answer 15

There is no chlorophyll

Question 16

State 5 uses of glucose produced during photosynthesis

Answer 16

Respiration
Stored as insoluble starch
Stored as fat/ oils
Making cellulose
Making amino acids

Question 17

State Two substances required for making proteins in plants

Answer 17

Nitrate ions and glucose

Question 18

Which substance is used to test for the presence of starch?

Answer 18

Iodine solution

Question 19

What colour will iodine solution turn int the presence of starch?

Answer 19

Blue/black

Question 20

What colour will iodine solution turn if no starch is present?

Answer 20

Remains orange

Question 21

Which substance is used to test for the presence of sugar?

Answer 21

Benedict’s solution

Question 22

What colour will Benedict solution turn in the presence of sugar?

Answer 22

Red (lots of sugar)
Orange (some sugar)
Green (small amount of sugar)

Question 23

What colour will Benedict’s solution turn if no glucose is present?

Answer 23

Remains blue

Question 24

Which substance is used to test for the presence of protein?

Answer 24

Biuret’s solution

Question 25

Which colour will biuret solution turn in the presence of protein ?

Answer 25

Purple

Question 26

What colour will biuret solution turn if no protein is present?

Answer 26

Remains blue

Question 27

Which substance is used to test for the presence of lipids (fats) ?

Answer 27

Ethanol

Question 28

What colour will ethanol solution turn in the presence of fats?

Answer 28

Creamy white

Question 29

What colour will ethanol solution turn if no fat is present?

Answer 29

Remains colourless

Question 30

Describe the relationship between a light’s distance from a plant and rate of photosynthesis (HT only)

Answer 30

Power ÷ distance squared (inverse square law)

Question 31

What is the name of respiration with oxygen?

Answer 31

Aerobic

Question 32

What is the name of the respiration without oxygen?

Answer 32

Anaerobic

Question 33

What is the word equation for aerobic respiration?

Answer 33

Oxygen+glucose → carbon dioxide+water (+energy)

Question 34

What is the balanced symbol equation for aerobic respiration?

Answer 34

C6H12O6 + 6O2 → 6CO2 + 6H2O (+ATP)

Question 35

What is the word equation for anaerobic respiration in animals?

Answer 35

Glucose → lactic acid

Question 36

What is the balanced symbol equation for anaerobic respiration in animals?

Answer 36

C6H12O6 → 2C3H6O3

Question 37

What is anaerobic respiration in yeast cells called?

Answer 37

Fermentation

Question 38

What happens to your breathing and heart rate when you exercise?

Answer 38

Increase

Question 39

What is the name of the main organ in the respiratory system?

Answer 39

Lungs

Question 40

What is the name of the sheet of muscle beneath the lungs?

Answer 40

Diaphragm

Question 41

What is the scientific name for the windpipe?

Answer 41

Trachea

Question 42

What is the scientific name for the air sac?

Answer 42

Alveoli

Question 43

The windpipe divides into two tubes when it reaches the lung. What are these tubes called?

Answer 43

Bronchi/bronchus

Question 44

State three uses of energy in organisms

Answer 44

Chemical reactions to build larger molecules Movement Keeping warm

Question 45

What is the effect of exercise on heart rate during exercises?

Answer 45

Increase

Question 46

What is the effect of exercise on breathing rate and breathing volume during exercise?

Answer 46

Increase

Question 47

Why does heart rate, breathing rate and breathing volume increase during exercise?

Answer 47

Supply muscles with more oxygenated blood

Question 48

State 2 effects of long periods of anaerobic respiration

Answer 48

Built up of lactic acid Oxygen debt

Question 49

Where is the lactic acid broken down?

Answer 49

The liver

Question 50

How is lactic acid broke down?

Answer 50

Reacts with oxygen to convert to glucose

Question 51

Define oxygen debt

Answer 51

Amount of O2 required to break down Lactic acid

Question 52

How would the lung capacity of an athlete compare to a non-athlete?

Answer 52

Larger

Question 53

How would the resting heart-rate of an heart of an athlete compare to a non-athlete?

Answer 53

Lower

Question 54

Define metabolism

Answer 54

Sum of all reactions in a cell/body

Question 55

During metabolism, glucose is converted into which three substances?

Answer 55

Starch Glycerol Cellulose

Question 56

During metabolism, lipids are formed from which molecules?

Answer 56

1 molecule glycerol 3 molecules of fatty acids

Question 57

During metabolism, which substance are used to form amino acids?

Answer 57

Glucose Nitrate ions

Question 58

State 2 ongoing processes that are part of metabolism

Answer 58

Respiration Digestion Protein synthesis

Question 59

Which type of respiration occurs if there is insufficient oxygen available?

Answer 59

Anaerobic respiration

Question 60

What is the word equation for anaerobic respiration in yeast and plant cells

Answer 60

Glucose → ethanol + carbon dioxide