Photosynthesis Flashcards
Organisms, such as plants and bacteria, that make their own food and energy, usually through photosynthesis.
Autotrophs
Organisms, such as animals, that get their food from eating autotrophs.
Heterotrophs
Food and energy made by plants using photosynthesis
Glucose
______ + 6H20 —-(photosynthesis)—> C6H12O6 + 6O2
6CO2
Equation for photosynthesis
6CO2+ 6H2O ——> C6H12O6 + 6O2
6CO2 + _____ ——> C6H12O6 + 6O2
6H2O
6CO2 + 6H2O ——> _______ + 6O2
C6H12O6
6CO2 + 6H2O —-> C6H12O6 + ______
6O2
All of the food consumed by humans can be traced back to :
Photosynthetic plants
Cell energy molecule
Adenosine triphosphate (ATP)
Unit of a plant cell that makes energy (sugars)
Chloroplasts
Chloroplasts contain:
Stroma
Thylakoids
A thick fluid contained in a chloroplast
Stroma
Membranous sac contained in the chloroplasts
Thylakoids
Pigments that absorb light energy in chloroplasts
Chlorophyll
Two processes that photosynthesis is composed of:
Light reactions
Calvin cycle
Convert solar energy to chemical energy
Light reactions
Makes sugar from carbon dioxide
Calvin cycle
First step of a photosystem
Photon strikes chlorophyll
Second step in a photosystem:
An electron is highly energized
Third step of a photosystem:
The high energy electron is caught by an electron accptor
Two types of photosystems:
Photosystem II
Photosystem I
Photosystem II
First photosystem that occurs; “water splitting photosystem”
Photosystem I
Second photosystem that occurs; “NADPH producing photosystem”
Event that connects the two photosystems
Electron transport chain (ETC)
First step of photosynthesis
The light reactions
What does the ETC do?
It releases energy that the chloroplasts use to make ATP and connects the two photosystems
Sugar factory within the chloroplast
Calvin cycle
Happens during the Calvin cycle; carbon from carbon dioxide is fixed in the glucose molecule
Carbon fixation