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Summary Carbohydrates mind map

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  • AQA

Detailed mind map on the subtopic of carbohydrates from unit 1 - biological molecules of AQA A level biology.

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  • September 18, 2022
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  • 2022/2023
  • Summary
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emmabraithwaite
made of carbon hydrogen and " ""


MY !!!!!!!
up ,
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Important in cellular respiration ,
energy
Basic monomer unit = a saccharide (sugar) .ae#piemg,
MONOSACCHARIDES y carrier molecule for quick release of energy)
1 ↳ ↳
simple ( ( H2O )n
e.
g. É ,
→ 2 isomers : alpha glucose beta
-




Yon )
,
-


glucose
( %)
sugars
galactose ,
fructose
µ
in a condensation reaction
DISACCHARIDES →
pair of monosaccharides joined by a
glycosidic bond 40-4
↳ Glucose +
glucose → maltose
↳ Glucose + fructose → sucrose
\ - or ? In + tho

lactose
h OM
Glucose galactose
On
h
↳ + →



CARBOHYDRATES
POLYSACCHARIDES :
many monosaccharides joined in condensation reactions with glycosidic bonds
Starch : ar -



glucose polysaccharide for energy storage in plants ( in seeds and storage organs )
Insoluble : does not affect water potential of a cell 1 water does not enter due to osmosis)


large : does not diffuse out of the cell Compact .
:
large amounts stored in a small place
Hydrogen bonds can hold helix shape in
place
Unbranched or branched I branched has
many ends can be acted on by enzymes )
Mix of AMYLOSE Im branched .
long compact
, . Per storage or AMYLOPECTIN I branched , hydrolysed
quickly to release glucose ,
not used Br storage
Glycogen polysaccharide : found in animals and bacteria but never plants
Highly branched and compact Pound mainly in the muscles and liver

shorter chains of a -

glucose Insoluble and large
animal cells glycogen
Mam storage molecule in animals -



get energy from glucose ,
excess in


Cellulose polysaccharide
: of B-glucose with straight unbranched chains which run parallel
Hydrogen bonds form cross linkages between adjacent chains which add collective strength
Each alternate monomer rotated 1800 .
Good structural material
lellulose grouped to form micro fibrils , arranged in parallel groups of fibres

component of all walls :
provides ridgity and prevents the cell from bursting as water enters by
exerting inward pressure making all turgid ,
maintains stems and leafs ,
max surface area


for photosynthesis

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