Topic 6--> Plants
Study online at https://quizlet.com/_fcd1z0
1. What is pho- Photosynthesis, in plants and algae, is an endothermic reaction (takes in energy)
tosynthesis (in in which light energy is taken in from the sun to produce glucose and oxygen by
plants and algae) reacting carbon dioxide and water.
2. What are photo- Photosynthetic organisms are the main producers of food (biomass) for life on
synthetic organ- Earth.
isms?
3. Word equation Carbon dioxide+ water--> glucose+water
for photosynthe- --> == light energy and chrophyll
sis
4. How does the Carbon dioxide and oxygen--> diffuse in and our through stomata
plant get and re- Water---> roots and xylem
lease the prod- glucose--> phloem used the plant
ucts of photosyn-
thesis?
5. Chemical equa- 6O2+ 6H2O--> C6H12O6+6O2
tion photosyn-
thesis
6. What do plants as source of energy in respiration
use glucose for? to produce starch for storage
to synthesise lipids for an energy source in seeds
to form cellulose to make cell walls
to produce amino acids
7. What is a limiting A limiting factor is something in the enviornent that is in such short supply that
factor? What are it restricts life porcesses. As plants do not have unlimited resources their rate of
the limiting fac- hotosyntehiss is limited by which resource is at the lowest.
tors for the rate These resources could be:
Temperature
, Topic 6--> Plants
Study online at https://quizlet.com/_fcd1z0
of photosynthe- Light intensity
sis? Carbon dioxide concentration
Amount of chlorophyll
NOT water bc very litttle amount requred
8. Why is chlorphyll Chrlophyll is the pigment yhat absorbs light enery
a factor? So less = less photosynthesis
The levle within a plant can vary due to disease, lack of nutrients or loss of leaves
9. How does light As light intensity increases as does the rate of photosynthsis, bc the more light a
intenisty effect plant gets the faster the rate of photosynthessis so graph goes up, linear.
rate of phptosyn- THEN GRAPH PLATEAUS- this means that another factor is the limiting factor
thesis? DESCRIBE
GRAPH
10. How does car- As carbon dioxide increases as does the rate of photosynthsis, as the more carbon
bon dioxide ef- dioxide there is the faster the reaction so graph goes up, linear.
fect rate of ph- THEN GRAPH PLATEAUS- this means that another factor is the limiting factor bc
ptosynthesis? DE- there is enough
SCRIBE GRAPH
11. How does tem- As temperature increases as does rate,
perature effect 1. bc carbon dioixde and water molecules move faster due to how temp increases
rate of phptosyn- 2. enzymes move faster and therefore there is an increased frequency of successful
thesis? DESCRIBE collisions between reactants and enxymes = more products and faster rate
GRAPH SO graph is linear --> But then, rate drops after optimum temp , bc enymes
denature ,at some temp fully denature so rate is 0
12. How do limit- Comparing graphs, if you do different temps same light intensity and rate goes
ing factors work higher, temp was ur limiting factor
toegther
13.
Study online at https://quizlet.com/_fcd1z0
1. What is pho- Photosynthesis, in plants and algae, is an endothermic reaction (takes in energy)
tosynthesis (in in which light energy is taken in from the sun to produce glucose and oxygen by
plants and algae) reacting carbon dioxide and water.
2. What are photo- Photosynthetic organisms are the main producers of food (biomass) for life on
synthetic organ- Earth.
isms?
3. Word equation Carbon dioxide+ water--> glucose+water
for photosynthe- --> == light energy and chrophyll
sis
4. How does the Carbon dioxide and oxygen--> diffuse in and our through stomata
plant get and re- Water---> roots and xylem
lease the prod- glucose--> phloem used the plant
ucts of photosyn-
thesis?
5. Chemical equa- 6O2+ 6H2O--> C6H12O6+6O2
tion photosyn-
thesis
6. What do plants as source of energy in respiration
use glucose for? to produce starch for storage
to synthesise lipids for an energy source in seeds
to form cellulose to make cell walls
to produce amino acids
7. What is a limiting A limiting factor is something in the enviornent that is in such short supply that
factor? What are it restricts life porcesses. As plants do not have unlimited resources their rate of
the limiting fac- hotosyntehiss is limited by which resource is at the lowest.
tors for the rate These resources could be:
Temperature
, Topic 6--> Plants
Study online at https://quizlet.com/_fcd1z0
of photosynthe- Light intensity
sis? Carbon dioxide concentration
Amount of chlorophyll
NOT water bc very litttle amount requred
8. Why is chlorphyll Chrlophyll is the pigment yhat absorbs light enery
a factor? So less = less photosynthesis
The levle within a plant can vary due to disease, lack of nutrients or loss of leaves
9. How does light As light intensity increases as does the rate of photosynthsis, bc the more light a
intenisty effect plant gets the faster the rate of photosynthessis so graph goes up, linear.
rate of phptosyn- THEN GRAPH PLATEAUS- this means that another factor is the limiting factor
thesis? DESCRIBE
GRAPH
10. How does car- As carbon dioxide increases as does the rate of photosynthsis, as the more carbon
bon dioxide ef- dioxide there is the faster the reaction so graph goes up, linear.
fect rate of ph- THEN GRAPH PLATEAUS- this means that another factor is the limiting factor bc
ptosynthesis? DE- there is enough
SCRIBE GRAPH
11. How does tem- As temperature increases as does rate,
perature effect 1. bc carbon dioixde and water molecules move faster due to how temp increases
rate of phptosyn- 2. enzymes move faster and therefore there is an increased frequency of successful
thesis? DESCRIBE collisions between reactants and enxymes = more products and faster rate
GRAPH SO graph is linear --> But then, rate drops after optimum temp , bc enymes
denature ,at some temp fully denature so rate is 0
12. How do limit- Comparing graphs, if you do different temps same light intensity and rate goes
ing factors work higher, temp was ur limiting factor
toegther
13.
