Photosynthesis Flashcards
What is photosynthesis
The process by which green plants algae and some other organisms transfer light energy into chemical energy
What kind of reaction is photosynthesis and why
Endothermic because it takes on energy
What is the energy from the sun captured by
Chlorophyll in the chloroplasts
Where does photosynthesis take place
The leaves
What can chlorophyll do
Absorb light energy primarily in the blue red wavelengths to drive the reaction
What are the factors affecting photosynthesis
- light intensity
- carbon dioxide
- amount of chlorophyll in leaf
- temperature
- limiting factors
How is light intensity a factor affecting photosynthesis
Photosynthesis rate increases with light up to a certain point
Why does light increase the rate of photosynthesis
The plant now has more light energy to carry out the photosynthesis reaction.
Therefore making the rate increase
Why is carbon dioxide a factor affecting photosynthesis
Higher co2 levels increase the rate until a saturation point (limiting reacting graph thing is the same as light)
How is the amount of chlorophyll in a leaf a factor affecting photosynthesis
Leaves trap less light energy than normal leaves, they’ll have a lower rate of photosynthesis
Why is temperature a factor affecting photosynthesis
Enzymes controlling photosynthesis work better at opium level.
What is the optimum temperature for photosynthesis
25’c - 35’c
What happens if we keep increasing the temperature
The enzymes will denature and the rate of photosynthesis will fall
How are limiting factors affecting photosynthesis
Thé factor in shortest supply limits the rate of photosynthesis
Name some adaptations of the leaf
• large surface area
• thin structure
• stomata
• chloroplasts
• waxy cuticle
