B1.4.1 - Photosynthesis Flashcards
What do plants have to take in to create food?
Carbon dioxide
Water
Light
Where does carbon dioxide diffuse through in photosynthesis?
Stomata
How do plants obtain water?
Through the root hair cells (in the roots) via osmosis
What are the reactants in photosynthesis?
Water and carbon dioxide
What are the products in photosynthesis?
Oxygen and glucose
Where does the wasted oxygen go in photosynthesis?
It is released into the environment
Where does photosynthesis take place in a plant?
The chloroplasts
Why are stems and leaves green?
They contain chlorophyll in their chloroplasts
What is chlorophyll?
A green pigment
From where do the plants obtain light energy?
The sun
Where does glucose store its energy during photosynthesis?
Within its chemical bonds
How many main stages of photosynthesis reactions are there?
2
Explain the light dependant photosynthesis main stage
Energy transferred from light splits water molecules into oxygen gas and hydrogen ions
Explain the non-light dependant photosynthesis main stage
Carbon dioxide gas combines with the hydrogen molecules to create glucose
What type of reaction is photosynthesis?
Endothermic
What does photosynthesis being an endothermic reaction mean?
It needs to transfer energy from its surroundings to keep it going
What do plants use the glucose produced for?
Respiration
Conversion into other sugar molecules
Conversion into starch
Why do plants convert unneeded glucose into starch?
To provide a store of energy and to help with respiration during the night when there is no light
What can chemical reactions in plants create?
Sugars, starch, protein, cellulose, fats and more
