Photosynthesis Flashcards
What are the adaptions of a leaf?
broad leaf= large surface area
contains chloroplasts= contains chlorophyll which traps light energy
thin leaf= short diffusion path
air space= gas exchange
Xylem= transports water
Guard cells= controls opening and closing of stomate and prevents water loss
What are the uses of glucose?
- starch for storage
- respiration
-lipids for energy store in seeds - amino acids and protein synthesis
- cellulose for strength
What factors affect the rate of photosynthesis?
- temperature
- co2 concentration
- amount of chlorophyll
- light intensity
How does temp affect rate of photosynthesis?
increasing temperature, increases rate photosynthesis, more particles gain KE energy. Rate of photosynthesis decreases at a certain point as enzymes denature after reaching their optimum temp
How does the amount of chlorophyll affect rate of photosynthesis?
decreasing amount of chlorophyll, decreases rate of photosynthesis as chlorophyll is required to absorb energy
How does co2 concentration affect rate of photosynthesis?
increasing co2 concentration, increases rate of photosynthesis.
How does light intensity affect rate of photosynthesis?
increasing light intensity, increases rate of photosynthesis
What is a living factor?
environmental factor that restricts the rate of photosynthesis
Why is photosynthesis an endothermic reaction?
energy is transferred from the environment to the chloroplast
Where does photosynthesis take place?
within the chloroplast of palisade cells
What is photosynthesis?
process by which plants synthesis glucose using light energy.
Why is glucose stored as starch in plant cells?
- compact
- insoluble
can be broken down into glucose when photosynthesis in not happening
Why is glucose broken down?
to release energy
Why might a plant not have enough chlorophyll?
tobacco Mosaic Virus
lack of nutrients
environmental stress
How do farmers artificially create the optimum temp for plants to grow well?
- plants can be placed greenhouses in colder climates, traps the sun’s heat and increases the temp
- artificial light so photosynthesis can occur at day and night
- pump carbon dioxide or use a paraffin heater which produces heat and carbon dioxide
