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BIOLOGICAL MOLECULES
NUCLEIC ACIDS
ENERGY AND ATP
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Cards (9)
Structure of ATP
Contains adenine,
ribose
, phosphates- adenine and
ribose
combine to form adenosine, plus 3 phosphates.
Hydrolysis of ATP equation
ATP +
H2O
----> ADP +
Pi
+ E
How does ATP store energy?
-Bonds
between
phosphate
groups are unstable so have a low activation energy
-meaning they are easily
broken
-when they are
broken
they release a
considerable
amount of energy
What enzyme catalyses the hydrolysis of ATP
ATP hydrolase (
ATPase
)
Synthesis of ATP
-Conversion
of
ADP
to ATP
-reversible
-addition of
inorganic phosphate
to
ADP
What enzyme catalyses the synthesis of ATP?
ATP synthase
What type of reaction is the synthesis of ATP?
Condensation
What ways do the synthesis of ATP occur?
3 ways:
chlorophyll-containing
plant cells during
photosynthesis
plant
and animal cells during
respiration
plant and animal cella when
phosphate
groups are transferred from
donor
molecules to ADP
What are the roles of ATP?
Immediate energy source
:
metabolic processes
movement
active transport
secretion
activation of
molecules
(
Pi phosphorylate
other molecules)