B8 - Photosynthesis

Question 1

photosynthesis

Answer 1

-endothermic reaction
-energy to chloroplasts - light
-converts co2 + water to o2 and glucose

Question 2

endothermic reaction

Answer 2

-input energy from environment
-uses more energy from environment than released

Question 3

by product of photosynthesis

Answer 3

-o2

Question 4

balanced equation

Answer 4

6Co2 + 6H2o —> C6 H12 O6 + 6O2

Question 5

glucose

Answer 5

-used immediately by cells
-converted to insoluble stores

Question 6

Leaf adaptations

Answer 6

-broad
-thin
-chloroplasts
-veins
-air spaces
-guard cells

Question 7

Leaf adaptations: broad

Answer 7

-more SA
-max sunlight

Question 8

Leaf adaptations: thin

Answer 8

-short diffusion distance for gases

Question 9

Leaf adaptations: chlorophyll

Answer 9

-absorbs light

Question 10

Leaf adaptations: veins

Answer 10

-xylem = more water to cells
-phloem = removes waste

Question 11

Leaf adaptations: air spaces

Answer 11

-co2 + o2 enter leave cells

Question 12

Leaf adaptations: guard cells

Answer 12

-open / close stomata
-regulates gas exchange
`

Question 13

Algae

Answer 13

-aquatic organism
-photosynthesises in water

Question 14

Adaptation of Algae

Answer 14

-large SA to absorb co2 in water (dissolved)
-o2 released dissolved

Question 15

limiting reactant

Answer 15

resources in short supply
-affect rate of photosynthesis

Question 16

light

Answer 16

-more = increases rate
-brighter = faster rate

Question 17

temp

Answer 17

-increase = more photosynthesis
-too high = denatured = rate falls

Question 18

Co2

Answer 18

-most common limiting reactant
-increase = speeds up rate

Question 19

Co2 concentration at night/ morning

Answer 19

-increases at night as plants respire
-as L.I + temp increases = co2 falls

Question 20

Chlorophyll

Answer 20

-limited = decreases rate

Question 21

ornamental plants and chlorophyll

Answer 21

-have some chlorophyll free areas
-limited growth compared to green plant

Question 22

Mg deficiency

Answer 22

-no chlorophyll made
-plant may die

Question 23

In dim light, leaves

Answer 23

turn green

Question 24

Light intensity formula

Answer 24

L.I ∝ 1/d2

Question 25

plants respiration

Answer 25

24hrs a day
-growth

Question 26

glucose used in

Answer 26

-respiration
-storage

Question 27

glucose makes

Answer 27

-cellulose
-starch
-complex carbs

Question 28

cellulose

Answer 28

-strengthen cell wall

Question 29

starch

Answer 29

-insoluble
-store

Question 30

why can’t glucose be stored

Answer 30

-affect osmosis rates
-affect water balance
-

Question 31

glucose forms amino acids by

Answer 31

-combining sugars + nitrate ions + mineral ions from soil

Question 32

amino acids

Answer 32

-form enzymes
-by respiration energy

Question 33

starch use

Answer 33

-energy store for when it’s dark
-survive winters (stored in bulbs - potatoes)

Question 34

Carnivorous plants eg

Answer 34

-pitcher pants
-venus fly trap
-sundews

Question 35

Carnivorous plants are adapted to

Answer 35

-grow in nitrate-poor soil

Question 36

How do Carnivorous plants obtain nutrients

Answer 36

from their prey

Question 37

Lipids formed by

Answer 37

-glucose from photosynthesis
-energy from respiration

Question 38

Lipids use

Answer 38

-store energy
-strengthen cell wall
-eg seeds

Question 39

Garden greenhouse

Answer 39

-polytunnels to grow crops
-more controlled
-warmer atmospere = increases rate

Question 40

Hydroponics

Answer 40

-ensures perfect condition for growth
-controlled by computer software
-expensive
-high profits

Question 41

Pros of hydroponics

Answer 41

-less staff needed
-shorter growth time
-larger/cleaner crops

Question 42

Cons for hydroponics

Answer 42

-lots of electricity / gas used
-expensive monitoring equipment