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Final Exam Review

40% of Test
STUDY
PLAY
the products of the light reactions of photosynthesis that are utilized in the Calvin cycle
atp and nadph
describe the functioning of photosystem II?
P680 are filled by electron derived H20
Chloroplasts are found mainly in the cells of the ______, the interior tissue of the leaf
mesophyll
What features are associated with photosystem I?
P680are filled by electrons derived from H2O
Which events occurs in the light reactions of photosynthesis?
solar to chemical energy. splitting of water, regeneration of atp
Where does the Calvin cycle take place?
stroma/chloroplasts
In any ecosystem, terrestrial or aquatic, what group(s) is (are) always necessary?
autophrophs
When oxygen is released as a result of photosynthesis, it is a direct by-product of
splitting of water
What are the products of linear photophosphorylation?
atp and nadph
Reduction of NADP+ occurs during
light reactions of PI
Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which processes?
Light Reactions
In a plant cell, where are the ATP synthase complexes located
Thylacoid Membrane
Where do the enzymatic reactions of the Calvin cycle take place?
Stroma
Where does glycolysis take place in eukaryotic cells?
cytosol
In addition to ATP, what are the end products of glycolysis?
nadh and pyruvate
The ATP made during glycolysis is generated by
substrate level phosporlation
During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, most of the potential energy contained in glucose is
stored ATP in phosphate groups
In the process of carbon fixation, RuBP attaches a CO2 to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. After phosphorylation and reduction produces glyceraldehyde 3-phosphate (G3P), what more needs to happen to complete the Calvin cycle?
Regeneration of Co2 acceptor (RuBP)
A molecule that is phosphorylated has
increased in chemical reactivity, and can do cellular work
In glycolysis, for each molecule of glucose oxidized to pyruvate what comes from this?
4 atp - 2 used = 2atp (2nadh)
Starting with one molecule of glucose, the energy-containing products of glycolysis
2 atp, 2 nadh, 2 pyruvate
The light reactions of photosynthesis supply the Calvin cycle with
atp and nadph
Which of the following does not occur during the Calvin cycle?
realease of oxygen
Which sequences correctly represents the flow of electrons during photosynthesis
H20 -adph - calvin cycle
Reactions that require CO2 take place in
stroma, (calvin cycle)
The NADPH required for the Calvin cycle comes from
PSI, reduction of nadp+ in light reactions
What is the primary function of the Calvin cycle?
synthesis of sugar (G3p)
Why is glycolysis described as having an investment phase and a payoff phase?
spends atp, and produces atp
Which kind of metabolic poison would most directly interfere with glycolysis?
agent that mimics structures of glucose, and not metabolized
How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one molecule of pyruvate
3 ( 2 CO2 are released)
The transport of pyruvate into mitochondria depends on the proton-motive force across the inner mitochondrial membrane. How does pyruvate enter the mitochondrion?
through active transport
Why is glycolysis considered to be one of the first metabolic pathways to have evolved?
present in most organisms, no O2, found in cytosol
Which of the following normally occurs regardless of whether or not oxygen (O2) is present?
glycolosis
Inside an active mitochondrion, most electrons follow which pathway?
calvin cycle - nadh - electron transport chain - oxygen
Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon dioxide (CO2) and water?
oxidated phosporylation
The primary role of oxygen in cellular respiration is to
make the fall of electrons easier
During aerobic respiration, electrons travel downhill in which sequence?
glucose - nadh - electron transport chain - oxygen