core questions Flashcards
What are chloroplasts
organelles in a plant cell that contain chlorophyll and are the site of respiration.
What is photosynthesis
A a chemical reaction in which plants produce glucose and oxygen from carbon dioxide and water
Where does the energy needed for photosynthesis come from
Light
what is the word equation for photosynthesis
carbon dioxide +water—>glucose +oxygen
What is the role of chlorophyll
To absorb light energy
What type of cell contains lots of chloroplast
Palisade cells
Why are palisade cells found near the top of leaves
so they can absorb as much sunlight as possible for photosynthesis
what is the purpose of the waxy cuticle
prevents water loss
why are leaves green
They are filled with chlorophyll which is a green pigment
what are stomata
small holes on the underside of the leaf that through carbon dioxide can enter and water and oxygen can leave
why do leaves have a large surface area
To absorb as much sunlight as possible
What do plants do with the glucose produced by photosynthesis
1.use it for respiration
2.store it as starch
3.Use it to make cell walls
What is the name of the chemical added to a leaf in order to test for starch
Iodine solution
What colour change would you expect to see from Iodine if starch is present
Brown to blue-Black
What is respiration
A chemical reaction that releases energy from glucose
