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Vocab. Ch 17 Plant Nuitrition
photosynthesis
14
Biology
9th Grade
01/03/2011

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Term
autotroph
Definition
any organism capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy, as most plants and certain bacteria and protists
Term
heterotroph
Definition
an organism requiring organic compounds for its principal source of food.
Term
ATP
Definition
adenosine triphosphate: an ester of adenosine and triphosphoric acid, C 10 H 12 N 5 O 4 H 4 P 3 O 9 , formed esp. aerobically by the reaction of ADP and an orthophosphate during oxidation, or by the interaction of ADP and phosphocreatine or certain other substrates, and serving as a source of energy for physiological reactions, esp. muscle contraction
Term
photosynthesis
Definition
the synthesis of complex organic materials, esp. carbohydrates, from carbon dioxide, water, and inorganic salts, using sunlight as the source of energy and with the aid of chlorophyll and associated pigments
Term
pigment
Definition
any substance whose presence in the tissues or cells of animals or plants colors them
Term
chlorophyll
Definition
the green coloring matter of leaves and plants, essential to the production of carbohydrates by photosynthesis, and occurring in a bluish-black form, C 55 H 72 MgN 4 O 5 (chlorophyll a), and a dark-green form, C 55 H 70 MgN 4 O 6
Term
thylakotd
Definition
a flattened sac or vesicle lined with a pigmented membrane that is the site of photosynthesis, in plants and algae occurring in interconnected stacks constituting a granum of the chloroplast, and in other photosynthesizing organisms occurring either singly or as part of the cell membrane or other structure.
Term
photosystem
Definition
either of two pigment-containing systems, photosystem I or II, in which the light-dependent chemical reactions of photosynthesis occur in the chloroplasts of plants
Term
stroma
Definition
the matrix of a chloroplast, containing various molecules and ions.
Term
light dependant reactions
Definition
chemical reactions that convert carbon dioxide and other compounds into glucose
Term
light independant reaction
Definition
The energy released from ATP (produced during the light reactions) drives this metabolic pathway
Term
calvtn cycle
Definition
a series of reactions, occurring during photosynthesis, in which glucose is synthesized from carbon dioxide
Term
grana
Definition
one of the structural units of a chloroplast in vascular plants, consisting of layers of thylakoids.
Term
guard cell
Definition
either of two specialized epidermal cells that flank the pore of a stoma and usually cause it to open and close.
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