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Summary Organic molecules
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waler-T-norganicmoleculeimmmnmmpolar.hnequal distribution of charge delta
water molecule Hydrogen bonds in water Formed due
¥E9B q% to the opposing
"
g- Covalent bond
qgAÑÑ☒
&•Bn
•kÑRÑÑ☒zg
±
"
qg⑧gÑÑ☒
R☒Ba%
"
water is
unequal
a Polar molecule
distribution of charge .
×,
*
±
"
charges
←
s+ Oxygen has a
slight negative charge .
±
•kBHÑÑ☒zB "
Hydrogen
H
Hydrogen has a
slight positive charge . bonds
Water dissolving salt NaCl
"
H ,
Hydrogen positive attracted
①
-
atoms ' MM -
to
D8
negative chlorine .
a-
am
µ
negative oxygen atoms attracted
H M
to
positive sodium
o
'
H
H
MAH n
M
I
m
\
H
H o
Buffeirmandphscaleme
A buffer is a compound which behaves in such a
way as to resist changes in
pH .
Many inorganic compounds can act as buffers in biological systems .
Both H and OH ions are
always present in solution
any .
Ht ions Acidic I 7
H ions
-
Alkali 14-7
Hydrogen carbonate a
buffer HCO, -
In
be
the
sodium
human
and
body buffers also can
potassium phosphates .
Decreasing (mopping up ) acidity : HCO} -
H+ Hzco}
Decreasing ( mopping up ) Alkalinity : HCO, -
OH 105-1-1%0
Buffers are important in cells and in tissues because any changes in their
surroundings
blood plasma or tissue fluid ph can affect biochemical reactions since they're enzyme
controlled small change ph from neutral usually severly hinder their
'
a in
away can
progress
, Magnesium /Mg-4
Potassium 1h4
A constituent of Important in transmission
chlorophyll , giving of impulses .
it light absorbing
properties
Iron (Fe / Calcium Kat )
"
Important information
Is part of the of calcium pedate an .
Haem group . essential component of the
A constituent of middle lamella of plant
haemoglobin . Mineral cell walls
Ions Important information
of bones and teeth in
animals.
Nitrate IN 03-1
Nitrogen from nitrates
is used to make
Hydrogen Carbonate 41051
amino acids , proteins
nucleic acids and Important as buffers
chlorophyll
Phosphate ( Poi)
Used to make ATP
and nucleic acid
Used to make cell
membranes phospholipids
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