Summary Biochemistry Option IB Chemistry HL

OPTION B : BIOCHEMISTRY
Topic 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