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U1 Biological Molecules
Inorganic ions
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Inorganic
ions occur in solution in the
cytoplasm
and
body fluid
organisms, some in
high
concentrations and other in very
low
concentrations.
Hydrogen Ions
H+
which determine the
pH
of substances such as blood - the
higher
the concentration of hydrogen ions the
lower
the pH.
Iron ions
Fe2+
are a component of
haemoglobin
which is an
oxygen
carrying molecule in
red blood cells.
Sodium ions Na+ are involved in
co-transport
of
glucose
and
amino acids.
Phosphate
ions PO4
3-
are a component of
DNA
and
ATP.
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