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Photosyn. & Resp.

QuestionAnswer
What is the process of photosynthesis? Chemical Reaction.
Describe Photosynthesis: the process of changing light energy to chemical energy.
What is the energy stored as? Sugar.
What does photosynthesis occur in? Plants and some algae.
What does it use? Chlorophyll.
What is Chlorophyll? The green pigment in plants.
Why are plants called autotrophs? Plants are called autotrophs because they make their own food through photosynthesis.
Why are the leaves and stems of a plant green? The green color comes from the light that plants absorb and reflect.
What is the chemical equation for photosynthesis? 6CO2+12H2O+light ---> 6O2+6H2O+C6H12O6
When do the light reactions take place? The light reactions take place during the day because they need light.
When do the dark reactions take place? They occur during the night and the day because they don't need the light, just the energy.
What systems are the light reactions composed of? Photo-system 1 and 2 compose the light reactions. Photo-system 2 occurs before photo-system 1.
What is the chloroplast composed of? It is composed of a double membrane, a dense fluid called the stoma, thylakoids, and gran-um or the stacks of thylakoids.
How does CO2 enter the leaf and O2 leave? CO2 enters through the stomata and O2 leaves through the stomata.
Where does the released oxygen come from? The released oxygen comes from water, which is split through hydrolysis.
What are the two main reactions in photosynthesis? They are the dark reactions (Calvin Cycle), and the light reactions.
What does NADP+ do in photosynthesis NADP+ stores energized electrons taken from water.
What does carbon fixation do? Carbon fixation incorporates carbon into organic compounds for later use.
What is the spectrophotometer? This reads the amount of light absorbed and helps read the amount of light absorbed by photosynthesis.
What is the spectrum of light that plants absorb called? The absorption spectrum.
What is the action spectrum? It is the light that is absorbed and has the most effectiveness.
What are carotenoids? These are the other pigments plants have that we see a lot of in the fall.
What happens when a photon of light is absorbed? With on photon of light, an electron enters an excited state.
What happens to the "excited" electron? The electron becomes unstable, causing the electron to lose energy as heat.
What is a photo system composed of? They have a reaction center and multiple light-harvesting complexes.
Created by: lydiajanetaylor
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