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Biology
4- Atp , water and inorganic ions
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Summer Flitcroft
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Cards (7)
there are six important properties of water:
it is a
metabolite
in metabolic reactions such as the
condensation reaction
it is a
solvent
where metabolic reactions occur , i.e in the cytoplasm
has a relatively
high heat capacity
,
buffers temperature change
allowing large bodies to maintain relatively
stable temp
it has a relatively
high latent heat capacity
, losing water has a
cooling effect
strong cohesion
between water molecules
ice is
less dense
than water , allows organisms in
lakes
to
live
despite
freezing over.
inorganic ions and there uses:
hydrogen
ions change
PH
iron
ions are inside
haemoglobin
sodium
ions are used in the
co-transport
of
amino acids
and
glucose
phosphate
ion are used in
ATP
and
DNA
Adenosine triphosphate
(
ATP
) is a
nucleotide derivative
formed from
one molecule
of
ribose
,
one molecule
of
adenine
and
three phosphate groups
.
ATP hydrolyses
to
adenosine diphosphate
and an
inorganic phosphate group
through
catalysis
by the enzyme
ATP hydrolase
hydrolysis
of
ATP
provides
energy.
the
hydrolysis
of ATP releases an
inorganic phosphate
, this can then be used to
phosphorylate
other compounds which
increases
their
reactivity.
ATP
is resynthesized during
photosynthesis
and
respiration
by a
condensation
reaction of
ADP
and
Pi
which is catalysed by
ATP synthase.