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Chapter 5 Bio Nonmaj

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QuestionAnswer
Photosynthesis Process by which plants harness solar energy and convert it into chemical energy. W/ few exceptions all life on this planet ultimately depend on this
Light Energy 6CO2 + 6H2O --> C6H12O6+6O2
Redox Electrons moved from h20 to co2 / Energy from the sun
What were organisms before photosynthesis? Heterotrophs
What are organisms that obtain carbon by consuming preexisting organic molecules? Heterotrophs
What are organisms that make their own organic compounds from inorganic compounds (water and co2) Autotrophs
How did photosynthesis alter earth? Decreased CO2, lowered global temperature added oxygen gas to the atmosphere
What is the most abundant photosynthetic pigment in plants, algae and cynobacteria Chlorophyll
What are Chlorophyll b & carotenoids? Accessory pigments
Only absorbed light is photosynthetically active? Absorb red & blue. Reflect green. Accessory pigments extend used range of wavelengths
What are the two stages of photosynthesis? Light reaction and Carbon Reaction
Where does light reaction occur? Thylakoid membranes
What does light reaction convert solar energy into? Chemical energy
What does Carbon reactions reduce CO2 to? Glucose
Where does Carbon reaction occur in? Stroma
What does Carbon reaction not require? light ; independent reactions
what is photosystem? unit with chlorophyll a and other pigment molecules and proteins anchored in the thylakoid membrane
Photosystem 2 functions when? First, named as it was discovered
Photosystem two: pigment molecules absorb what? Light energy
Photosystem 2: transfer to what electrons
Photosystem 2: Ejected and grabbed by the first _____ in electron transport chain linking photosystems protein
Photosytem 2: Lost electrons replaced by __________. splitting water
Photosystem 2: ____ is a waste product oxygen gas
Created by: 648403736
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