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Biological molecules - Coggle Diagram
Biological molecules
water
polar molecule (dipole)
- covalent bond - hydrogen, oxygen
- O greater affinity for e = pulls closer
- +ve and -ve regions
- bonded in hydroxyl groups OH
= dissolve in water
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cohesion
-ve and +ve regions attract other molecules
O attracts H on other molecule
hydrogen bonds form
weak interactions = constantly break and form
solvent
- OH groups dissolve
- molecules for layer around ions and break substance apart
- O attracted to +ve ions, H attracted to -ve
- form solution
- non polar insoluble as not attract water
living organisms
- chemical reaction site
- transport dissolved compounds
habitat
- constant / stable environment
for aquatic organisms
- high LH of vapourisation so large amount of energy needed to overcome H bonds
- insulating layer on ponds
- surface tention supports insects
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-
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carbohydrates
-
condensation reaction
- 1,4 glycosidic bond
- releases water
-
monosaccharides:
- a-glucose
- b-glucose
- fructose - fruits and nectar
- galactose - produce glycolipids/proteins
- ribose - pentose monosaccharide
- deoxyribose - 1 less O on C2