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Lecture 8

Photosynthesis

QuestionAnswer
Chemoautotroph An organism that obtains energy by oxidizing inorganic substances. Needs only CO2 as a carbon resource
Photoautotroph Organisms that harvest light energy to drive synthesis of organic compounds
Photoheterotroph Organism that uses light to generate ATP. Must obtain C in organic form
Chemeoheterotroph Organism that requires organic molecules for both energy and carbon
Chloroplast Organelle that absorbs sunlight and uses it to drive the synthesis of organic compounds from CO2 and H2O
Stroma Dense fluid in chloroplast surrounding the thylakoid membrane and containing ribosomes and DNA
Thylakoid Exist in stacks called grans that are interconnected. Contain "machinery" used to convert light energy to chemical energy
Lumen Inside space of ER
Granum Stacks of membrane-bounded thylakoids in chloroplast
Light Reaction Occur in the thylakoid membranes of chloroplast, convert solar energy to chemical energy of ATP and NADPH, release O2
Dark Reaction Calvin Cycle
ATP synthase One of several membrane proteins that function in chemiosmosis. Uses the energy of H+ concentration gradient to make ATP
Electron Carrier Molecule capable of accepting electrons from one molecule and donating them to another
ETC Sequence of electron carrier molecules that shuffle electrons down a series of redox reactions that release energy used to make ATP
Cyclic Electron Flow Route of electron flow during the light reactions of photosynthesis that involves only Photosystem I and produces ATP
Chlorophyll Green pigment in membranes within chloroplasts. Participate in light reactions
Photosystem I Light capturing unit in chloroplast's thylakoid membrane
Photosystem II Light capturing units in chloroplast's thylakoid membrane
Rubisco Ribulose bisphosphate carboxylase. Enzyme that catalyzes the first step of Calvin Cycle
G3P 3 C carbohydrate that is the direct product of Calvin Cycle
Created by: 831425276
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