Title: The chemical nature of cells cont'
1The chemical nature of cells cont.
Inorganic molecules Water H20 Organic
molecules Carbohydrates Proteins Lipids Nucle
ic Acids
2The chemical nature of cells cont.
Inorganic molecules Water H20 Organic
molecules Carbohydrates Proteins Lipids Nucle
ic Acids
3Carbohydrates
Monomer C6H12O6 Sugars Monosaccharides
4Monomer C6H12O6 Sugars Monosaccharides
ONE
SUGAR
5Monomer C6H12O6 Sugars Monosaccharides ie
glucose, fructose, glacatose, ribose
6Polymer
Monomer
C6H12O6 C6H12O6
C12H22O11 H20
7Polymer
C6H12O6 C6H12O6
C12H22O11 H20
Disaccharide
Monomer
8Polymer
C6H12O6 C6H12O6
C12H22O11 H20 Monosaccharide
Disaccharide Monosaccharide
Monomer
9Polymer
C6H12O6 C6H12O6
C12H22O11 H20 Monosaccharide
Disaccharide Monosaccharide
Monomer
GLUCOSE
FRUCTOSE
SUCROSE
TWO SUGAR
10There are two classes of carbohydrate Simple
and Complex Simple Carbohydrates
Monosaccharides and Disaccharides
11There are two classes of carbohydrate Simple
and Complex Simple Carbohydrates
Monosaccharides and Disaccharides and Complex
Carbohydrates Polysaccharides
12Complex Carbohydrates Polysaccharides
13Complex Carbohydrates Polysaccharides
MANY SUGAR
Therefore polysaccharides are polymers (and many
are insoluble)
14Complex Carbohydrates Polysaccharides Glucose
is the most common monomer in polysaccharides
15Complex Carbohydrates Polysaccharides Glucose
is the most common monomer in polysaccharides
These important polysaccharides are comprised
entirely of C6H12O6
16Complex Carbohydrates Polysaccharides Glucose
is the most common monomer in polysaccharides
These important polysaccharides are comprised
entirely of C6H12O6 Glycogen form of
carbohydrate storage in animals formed around a
protein molecule primer
17Complex Carbohydrates Polysaccharides Glucose
is the most common monomer in polysaccharides
These important polysaccharides are comprised
entirely of C6H12O6 Glycogen form of
carbohydrate storage in animals Starch form of
carbohydrate storage in plants
18Complex Carbohydrates Polysaccharides Glucose
is the most common monomer in polysaccharides
These important polysaccharides are comprised
entirely of C6H12O6 Glycogen form of
carbohydrate storage in animals Starch form of
carbohydrate storage in plants Cellulose
carbohydrate used for structural support in plants
19Glycogen Form of energy storage in animals
20Glycogen Form of energy storage in
animals After digestion, glucose is absorbed
into the bloodstream.
21Glycogen Form of energy storage in
animals After digestion, glucose is absorbed
into the bloodstream. In the liver, these
glucose molecules bond together to form long
branched chains around a protein primer
22Glycogen Form of energy storage in
animals After digestion, glucose is absorbed
into the bloodstream. In the liver, these
glucose molecules bond together to form long
branched chains around a protein primer The
overall shape of this polysaccharide is circular
23Glycogen Form of energy storage in
animals After digestion, glucose is absorbed
into the bloodstream. In the liver, these
glucose molecules bond together to form long
branched chains around a protein primer The
overall shape of this polysaccharide is
circular Glycogen is stored in liver and muscle
tissue, approx 100g in the average human liver,
300g in muscle.
24Glycogen Form of energy storage in
animals After digestion, glucose is absorbed
into the bloodstream. In the liver, these
glucose molecules bond together to form long
branched chains around a protein primer The
overall shape of this polysaccharide is
circular Glycogen is stored in liver and muscle
tissue, approx 100g in the average human liver,
300g in muscle. Once glycogen storage has
reached capacity excess glucose is converted to
fat
25Starch Form of energy storage in plants
26Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch
27Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Sunlight Chlorophyll
28Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Sunlight Chlorophyll
29Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
30Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Used in cellular respiration to produce ATP
31Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Used in cellular respiration to produce ATP
Converted to sucrose and transported
32Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Used in cellular respiration to produce ATP
Converted to sucrose and transported
Used to form part of the organisms structure or
other substance such as nectar
33Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Used in cellular respiration to produce ATP
Anything left?
Converted to sucrose and transported
This leftover is converted to starch
Used to form part of the organisms structure or
other substance such as nectar
34Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch 6C02 6H20 C6H12O6 6O2
Anything left?
Converted to sucrose and transported
This leftover is converted to starch
Often to places to be converted and stored as
starch, such as tubers, rhizomes and leaves
35Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch Glucose molecules are joined together
to form spiral chains. This is branched liked
glycogen though not as heavily
36Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch Glucose molecules are joined together
to form spiral chains. This is branched liked
glycogen though not as heavily These spiral
chains form grains of starch
37Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch Glucose molecules are joined together
to form spiral chains. This is branched liked
glycogen though not as heavily These spiral
chains form grains of starch Starch is insoluble
therefore can be stored easily within a
cell. This does not effect the osmotic potential
of the cell
38Starch Form of energy storage in plants Net
excess of glucose from photosynthesis is stored
as starch Glucose molecules are joined together
to form spiral chains. This is branched liked
glycogen though not as heavily These spiral
chains form grains of starch Starch is insoluble
therefore can be stored easily within a
cell. This does not effect the osmotic potential
of the cell Easily converted to a disaccharide,
sucrose, for transportation to where it is
required
39Cellulose Forms a structural polysaccharide
(C6H10O5)n
40Cellulose Forms a structural polysaccharide
(C6H10O5)n Found in the cell wall of every
plant, the most abundant organic molecule on the
planet
41Cellulose Forms a structural polysaccharide
(C6H10O5)n Found in the cell wall of every
plant, the most abundant organic molecule on the
plant Glucose molecules are joined together to
form very long, unbranched chains.
42Cellulose Forms a structural polysaccharide
(C6H10O5)n Found in the cell wall of every
plant, the most abundant organic molecule on the
plant Glucose molecules are joined together to
form very long, unbranched chains. These chains
form bundles that are tough and fibrous and
provide structural support for the cell / plant
43Cellulose Forms a structural polysaccharide
(C6H10O5)n Found in the cell wall of every
plant, the most abundant organic molecule on the
plant Glucose molecules are joined together to
form very long, unbranched chains. These chains
form bundles that are tough and fibrous and
provide structural support for the cell /
plant Soooooo tough, that when eaten by a
herbivore often the cellulose cell walls need to
be first digested by symbiotic bacteria before
the herbivore (cow) can access the nutrients
inside.
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