Photosynthesis

Chapter 10 Photosynthesis Vocabulary: photosynthesis, autotroph, heterotroph, chlorophyll, mesophyll, stroma, thylakoid, light reactions, Calvin cycle, NADP+, photophosphorylation, carbon fixation, electromagnetic spectrum, wavelength, photons, spectrophotometer, absorption spectrum, action spectrum, carotenoids, photosytem, reaction-center complex, light harvesting complex, primary electron acceptor, linear electron flow, cyclic electron flow, photorespiration, bundle-sheath cells, C3 plants, C…
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Terms in this set (...)

Autotrophic
An organism capable of synthesizing its own food from inorganic substances, using light or chemical energy. Green plants, algae, and certain bacteria are autotrophs.
Chloroplasts
Organelle that absorbs sunlight and uses it to drive the synthesis of organic compounds from carbon dioxide and water.
Photosynthesis
The process that converts light energy into chemical energy that is stored in glucose or other organic compounds; occurs in plants, algae, and certain prokaryotes.
Heterotrophs
An organism that obtains organic food molecules by eating other organisms or substances derived from them.
Stomata
Pores on the leaf where O2 exits and CO2 enters
Stroma
The fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water.
Thylakoids
A flattened, membranous sac inside a chloroplast. They often exist in stacks called grana that are interconnected; their membranes contain molecular "machinery" used to convert light energy to chemical energy.
Chlorophyll
Green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.
Light Reactions
The first of two major stages in photosynthesis (preceding the Calvin cycle). These reactions, which occur on the thylakoid membranes of the chloroplast or on membranes of certain prokaryotes, convert solar energy to the chemical energy of ATP and NADPH, releasing oxygen in the process.
Calvin cycle
The second of two major stages in photosynthesis (following the light reactions), involving fixation of atmospheric CO2 and reduction of the fixed carbon into carbohydrate.
6CO2 + 6H2O → C6H12O6 + 6O2
What is the balanced equation for photosynthesis?
H2O
What provides electrons for the light reactions?

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Carbon dioxide (CO2)
What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle?
The stroma
Where does the Calvin Cycle take place?.
pigment
Light-absorbing molecule
ATP
(Adenosine triphosphate molecule) main energy source that cells use for most of their work.
ADP
(Adenosine diphosphate) The compound that remains when a phosphate group is removed from ATP. When all related reactions occur, energy is released. Can also be converted back to ATP in effect storing potential energy

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