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BS161 Exam 2
Respiration and Photosyn
37
Biology
Undergraduate 1
10/27/2011

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Term
Fermentation
Definition
partial degradation of sugars or other organic fuel that occurs without the use of oxygen.
Term
Redox Reaction
Definition
chemical reaction in which there is a transfer of one or more electrons
Term
oxidation
Definition
loss of electrons
Term
reduction
Definition
addition of electrons
Term
NAD+
Definition
Electron Carrier in Respiration. (product of Glycolysis and citric acid cycle)
Term
Proton (H+)
Definition
what usually follows electrons in a biological redox rxn
Term
Dehydrogenase
Definition
enzyme that removes a pair of hydrogen atoms from the substrate, thereby oxidizing it.
Term
NADH
Definition
Electron carrier that receives 2 electrons from glucose after it is dehydrogenated. (reduced form of NAD+)
Term
Electron Transport Chain
Definition
consists of a number of molecules built into the inner membrane of the mitochondria in which the electrons fall from NADH to oxygen by a series of steps and release energy. ((RESPIRATION))
Term
Glycolysis
Definition
process which occurs in the cytosol, breaks glucose into two pyruvates.
Term
Py Ox
Definition
C02 is broken off pyruvate and coenzyme A is added, a NADH is also reduced by pyruvate in this step.
Term
Oxidative Phosphorylation
Definition
phosphorylation of ADP to make ATP from the energy released in the redox reactions of the electron transport chain ((RESPIRATION))
Term
Inner Membrane of Mitochondrion
Definition
site of electron transport and chemiosmosis
Term
Oxidative Phosphorylation
Definition
accounts for almost 90% of ATP generated by respiration
Term
substrate-level phosphorylation
Definition
ATP made from reactions in glycolysis and citric acid cycle.
Term
Substrate-level phosphorylation
Definition
mode of ATP synthesis when an enzyme transfers a phosphate group from a substrate molecule to ADP rather than adding an inorganic phosphate.
Term
Active Transport
Definition
method by which pyruvate enters the mitochondrion.
Term
Light reactions
Definition
Part of photosynthesis that converts light energy to chemical energy
Term
Calvin Cycle
Definition
Glucose synthesis part of photosynthesis
Term
NADP+
Definition
electron acceptor in photosynthesis
Term
Photophosphorylation
Definition
addition of a phosphate to ADP using light energy to phosphorylate it
Term
Carbon Fixation
Definition
the initial incorporation of carbon into organic compounds
Term
NADPH and ATP
Definition
Products of light reactions and inputs of calvin cycle
Term
mesophyll
Definition
tissue in the interior of the leaf
Term
stomata
Definition
microscopic pores in mesophyll layer of leaf
Term
stroma
Definition
dense fluid surrounded by two membranes of the chloroplast
Term
thylakoids
Definition
third membrane system suspended in the stroma, made of sacs containing chloryphyll
Term
photosystem
Definition
reaction center complex surrounded by several light-harvesting complexes.
Term
linear electron flow
Definition
electron flow from photosystem II to photosystem I with electron transport chain between them
Term
Cyclic electron flow
Definition
uses photosystem I and cycles back to electron transport chain without involving photosystem II
Term
G3P
Definition
carbohydrate produced directly from the calvin cycle (not glucose)
Term
Ribulose Biphosphate
Definition
Five carbon sugar CO2 is attached to at the start of the calvin cycle
Term
Rubisco
Definition
Enzyme that catalyzes the addition of CO2 to the the five carbon sugar at the start of the calvin cycle
Term
Carbon Fixation
Definition
first phase of the calvin cycle
Term
Reduction
Definition
second phase of the calvin cycle
Term
Regeneration
Definition
third phase of calvin cycle
Term
adenylyl cyclase
Definition
converts ATP to cAMP in response to extracellular signal
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