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Intro To Biology
N/A
25
Biology
Undergraduate 2
09/28/2012

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Term
Oxidation
Definition
A substance that loses one or more electrons to another.
Term
Reduction
Definition
The substance that gains electrons in this reaction.
Term
Redox Reaction
Definition
The process by which electrons are moved from one molecule to another.
Term
Electron Carriers
Definition
Molecules that serve to transfer electrons from one molecule to another in ATP formation.
Term
Nicotinamide Adenine Dinucleotide (NAD)
Definition
Most important electron carrier in energy transfer. (taxi)
Term
Cellular Respiration
Definition
Aerobic harbesting of energy.
Term
Glycolysis
Definition
First stage of aerobic energy harvesting.
Term
Krebs Cycle
Definition
Second stage of aerobic energy harvesting.
Term
Citric Acid Cycle
Definition
First product of Krebs Cycle.
Term
Electron Transport Chain (ETC).
Definition
Third Stage of aerobic energy harvesting.
Term
ATP Synthase
Definition
An enzyme that functions in cellular respiration by bringing together ADP adn inorganic phosphate molecules to produce ATP.
Term
Photosynthesis
Definition
Process by which certain groups of organisms capture energy from sunlight and convert this solar energy into chemical energy that is initially stored in a carbohydrate.
Term
Stomata
Definition
Microscopic pores found in great abundance on the underside of leaves, that allow plants to exchange gases witht he atmosphere. Carbon Dioxide moves into plants through the stomata, while oxygen and water vapor move out.
Term
Chrloroplasts
Definition
Organelles within plant and algae cells that are the sites of photosynthesis.
Term
Thylakoids
Definition
Network of chloroplast membranes, active in photosynthesis.
Term
Stroma
Definition
Liquid material of chloroplasts.
Term
Chlorophyll a
Definition
Primary pigment active in plant photosynthesis.
Term
Photosystem
Definition
An organized complex of molecules within a thylakoid memebrane that, in photosynthesis, collects solar energy and transforms it inot chemical energy.
Term
Reaction Center
Definition
A pair of special chlorophyll a molecules and associated compounds that first receive the solar energy from photosystem pigments and then transform this solar energy into chemical energy.
Term
Calvin Cycle
Definition
C3 cycle, teh set of steps in photosynthesis in which energetic electrons are brought together with carbon dioxide and a sugar to produce an energetic carbohydrate.
Term
Fixation
Definition
Gas being incorporated into an organic molecule.
Term
Photorespiration
Definition
A process in which the enzyme rubisco reduces carbon fixation in photosynthesis by binding with oxygen instead of with carbon dioxide.
Term
Rubisco
Definition
An enzyme that allows organisms to incorporate atmospheric carbon dioxide into their own sugars during the process of photosynthesis.
Term
C4 Photosynthesis
Definition
A form of photosynthesis in which carbon dioxide is first fixed to a four-carbon molecule and then transferred to special cells in which the Calvin cycle is undertaken, bundle-sheath cells.
Term
CAM Photosynthesis
Definition
From of photosynthesis, undertaken by plants in hot, dry climates, in which carbon fixation takes place at night and the Calvin cycle occurs during the day.
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