Biology Questions and Answers
ADP phosphorylation is the addition of
one inorganic phof adenosine diphosphate thus crosphate in the moleculeatinge
ATP (adenosine triphosphate) and
incorporatinphosphorylation is oxig energy. Thedative wh (^) en the
energy incorporated comes from the
breaking of organic moloxygen as reagent, as in aerobic cellularecules having (^)
respiration. The reaction is called
photophosphorylation source is light, as in photosynthwhen the energyesis.
The energy incordisposable (liberated) porated into Ato other cellularTP is (^)
reactionsis formed again. when ATP hydrolyzes and ADP
- What are the stages into
which photosynthesis is
divided?
Photosynthesisphotochemical stage, or light reactions, is divided into the (^)
and the chemical stage.
- What are the processes of
the photochemical stage of
the photosynthesis process?
Photolysis of water, with liberation of
molecular oxyphotophosphorylation gen, andof ADP, with (^)
production of ATP and NADPH, are the
processes that occur dphotochemical stage of photosynthuring the (^) esis.
- How is the photic energy
absorbed by chlorophyll
transfered to ATP molecules in
photophosphorylation? How
will be the resulting ATP
used?
Light excites chlorophyll and energizes
electrons that jThe energy liberated ump off the moleculwhen these e.
electrons escape is used in the
phosphorylation oThe enzyme that catalyzesf ADP, forming ATP. the reaction (^)
is the ATP synthase.
The resulting ATP is then consumed in
the next chemical stage photosynthesis to energeticallyof (^) enrich
carbon dioxide for the formation of
glucose.
- Is it correct to consider
water decomposition by the
action of light the basis of the
photosynthesis process?
Besides ADP photophosphorylation,
photic enbreaking of water ergy is also resmoleculponsibles duringe for the
photosynthesis in a process known as
water photolysis.molecules are exposed to photic e In this reaction waternergy (^)
and liberate protons (hydrogen ions),
highly energetic electrons aoxygen (O nd molecular
will be incorporat^2 ). Later the ed into carbohydrogen atomsn dioxide^
molecules to fis the hydrogen donor fororm glucose. Since water
photosynthesis it is correct to say that
the water process. photolysis is the basis of the
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