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Summary Biochemistry Option IB Chemistry HL
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OPTION B : BIOCHEMISTRYTopic 1 :
Intro
Functions of bio molecules
-
light energy
>
- chemical energy
-
catalyst
-genetic information
-
structure
-
production
energy
and storage
Photosynthesis 6428 + 6002 +
energy
>
-
CHi20s + GO2
Respiration CMiz0s + 60
-
6CO2 +
6128 +
energy
-
-
-
-
-
Topic 2: Proteins and enzymes
Amphoteric in nature (COOH) acidic (NHz) basic
+
RNH2 +
*
H > -
RNH3
RCoon - RCOO tht
Transfer of the proton from the Cool to the NH2
forms neutral zwitterion
, Isoelectric point-pu at which the concentration
of a zwitterien is maximum and the overall
chargeis
transfer H
-w -" -0 >
- m
= N+
-
-
co
--
S
o H of proton a k g
R
-
H
High melting points
Famino acids exist in zwitterionic fam in the
the
solid state attraction between oppositely
>
-
stronger
charged groups on adjacent zwitterions
Solubility
>
-
fairly soluble in water
↳ solution anino acids exist as ions
aqueous
which can be readily solvated (hydrated)
>
-
lower solubility around the iscelectric point
at other pis because acid
>
-
higher amino
then has an overall charge
>
- low solubility in non-polar organic molecules
↳ the
energy needed to overcome the strong
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