Biology Flashcards
What do all organisms need food/glucose for?
Respiration
Where in the plant does photosynthesis occur, and in which part of the cell
Leaves, chloroplast
What is the word equation for photosynthesis?
carbon dioxide +water –> glucose + oxygen
What is the balanced symbol equation for photosynthesis?
6CO2 + 6H2O –> C6H12O6 + 6O2
What does carbon dioxide diffuse through?
The stomata
What type of reaction is photosynthesis?
Endothermic
3 adaptations in the plant and how this helps photosynthesis.
Leave are broad - larger surface area for light to be absorbed
Leaves are thin - diffusion distances for gases are short
Guard cells - open and close stomata to regulate gas exchange
What are the uses of glucose in plants?
Release energy for respiration
Converted to insoluble starch for energy storage
Produce cellulose to make cell walls
Combine with nitrate ions from the soil to make amino acids
What is hydroponics?
Where plants are grown in water with mineral ions, instead of soil
The mineral ion concentrations can be carefully controlled and optimised
Equation for light intensity.
1/distance^2
What is aerobic respiration?
a chemical reaction using oxygen and glucose to transfer energy for all living processes
Where does aerobic respiration take place?
in eukaryotic cells in the mitochondria
Word formula for aerobic respiration.
glucose + oxygen –> carbon dioxide + water
Chemical formula for aerobic respiration.
C6H12O6 + 6O2 –> 6CO2 + 6H2O
What type of reaction is aerobic respiration?
Exothermic
