Cambridge International AS and A Level Biology Coursebook with CD-ROM
This document includes all the information and details you need to know for chapter 2-Biological molecules for biology AS level and leaves out the unnecessary parts that are not relevant to exam questions.
The Cell Cycle and Mitosis with precise notes and mnemonics.
HUMAN HEART STRUCTURE WORK
cell and nuclear division mitosis and dna replication
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CIE
Biology
Unit 2 - B Biological Molecules
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Lipids are all organic molecules which are insoluble in water
fattyAcids
A series of aids found in lipids
contain a ig gap coat
Hydrocarbon tails as it eaten aeonslong
If they have c then they are known as unsaturated
meet more
easy
Animal lipids are typically saturated Cc c and occur as bees whenas plant lipids
are often unsaturatedand our as a is
Alcohols and Estes Alcohol
is an organicmoleculeanlavingOHgap
este bond homedbelowalcoholSacid Coat OH Coo 3
Alcohols CONDENSATION REACTION
organic molecules containing a hydosyl gap OH attached to a carbon atom
the reaction between an acid and alcohol produces a denial imam as ester
the chemical link between acid alcohol is called an eslerband
COOH on an acid reads with OH on alcohol to form an este band Coo
Condensation reaction
COOH joinsOH Condesobion
Triglycerides Esterbond
T.se are fat andoiks
A glyceride is on ester laned when a halts and combines with alcohol glycerol
has 3 hydosyl gaps
Glycerol
Each one able to go through a condensation reactor with
the final molecule contains thee fatty and chains I 3 ester bends a
fatty acid
Insoluble in war
soluble in ethanol
Non polar bib
Roles of triglycerides
esculent energy reserves rich in c it sends
under the derris of the shinSaoud Ldress
stoned
insulator
be used as a metabolic source of water when osidised i respiration
may
Phospholipids
Phosphate head is hydrophilic
Two fattyacid tails are hydrophobic impermeable to hydrophilic substances
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