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ch 6 DC
ch 6 photosynthesis vocab
25
Biology
9th Grade
12/13/2013

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Term
biochemical pathway
Definition
a complex series of chemical reactions in which the products of on reaction become the raw materials for the next reaction
Term
light reaction
Definition
the reactions of photosynthesis in which light is absorbed
Term
visible spectrum
Definition
white light separated out into its component parts
Term
wavelength
Definition
the distance between the peaks of waves of energy
Term
pigment
Definition
a compound that absorbs light
Term
chlorophyll
Definition
the most important pigment located in the thylakoid of a chloroplast
Term
accessory pigment
Definition
a pigment that helps another pigment capture light energy
Term
carotenoid
Definition
yellow, orange and brown pigments
Term
photosystem
Definition
a cluster of pigment molecules
Term
primary electron acceptor
Definition
a molecule that accepts electrons lost by chlorophyll 'a' molecules
Term
electron transport chain
Definition
molecules in the thylakoid membranes that transfer electrons from one molecule to the next molecule in the series
Term
NADP
Definition
an organic molecule that accepts electrons during redox reactions
Term
chemiosmosis
Definition
a process of movement of protons down a concentration gradient across a membrane synthesizing ATP
Term
ATP synthase
Definition
a protein that harnesses energy producing ATP by adding a phosphate to ADP
Term
ADP
Definition
adenosine diphosphate which can convert to ATP by adding a phosphate group
Term
carbon fixation
Definition
the bonding of CO2 into organic compounds
Term
C3 plants
Definition
a plant that uses only the Calvin cycle for carbon fixation
Term
stomata
Definition
small pores located on the underside of leaves
Term
C4 pathway
Definition
a pathway in which some plants fix CO2 into four-carbon compounds
Term
CAM
Definition
a pathway used by some plants that open their stomata at night to fix CO2
Term
grana
Definition
stacks of thylakoids in a chloroplast
Term
stroma
Definition
the solution in a chloroplast surrounding the grana
Term
autotrophs
Definition
organisms that can produce their own food
Term
heterotrophs
Definition
organisms that cannot produce their own food, but feed on other organisms
Term
photosynthesis
Definition
the process of capturing sunlight and storing its energy in organic compounds
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