B8 Flashcards
What absorbs the sunlight in photosynthesis
Chlorphyll in the chloroplasts
What is the equation for photosynthesis
Carbon dioxide + water ->glucose + oxygen
What type of reaction is photosynthesis
Endothermic
What is the first step of photosynthesis
Carbon dioxide is taken in by the leaves, and water is taken up by the roots
What is the second step of photosynthesis
The chlorophyll traps the light energy
What is the third step of photosynthesis
This energy is used to convert the carbon dioxide and water into glucose
How are leaves adapted for photosynthesis
-Leaves are broad and flat so they have a large surface area
-thin leaves so diffusion path is short
-Photosynthetic cells
-guard cells open the stomata so that gases can diffuse in and out
How does a lack of light affect photosynthesis
a lack of light Would slow down the rate because light transfers the energy for the process.
How does temperature affect the rate of photosynthesis
If the temperature is too hot or cold the enzymes will denature in the plant
What are the 4 ways that rate of photosynthesis can be affected
Lack of light and carbon dioxide
Temperature
Lack of chlorophyll
What is a limiting factor
Anything that stops the rate of photosynthesis increasing above a certain level
What are the 4 ways glucose from photosynthesis can be used in a plant
used tp produce cellulose
Used for respiration
Used to produce proteins
Why is glucose stored as insoluble starch
So that it does not affect the water balance of the plant. High concentrations of dissolved glucose can affect osmosis.
What 3 substances are used for storage in plants
Insoluble starch
Fats and oils
Give an example of a carnivorous plant
Vênus fly trap
