the chemicals of life
2020-10-22 15:16:57 0 举报AI智能生成
chemical
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chemical elements
H-Hydrogen
O-Oxygen
molecular formula
H₂O
function
as a solvent
as a medium transport
as a reactant
as a cooling agent
as a temperature regulator
As a supporting agent
sugar/carbon hydrate
chemical elements
C H O
molecular fuomula
（CH₂O)n
composition unit
monosaccharides
classification
Monosaccharides
glucose
fructose
galactose
.etc
Disaccharides
sucrose
lactose
maltose
.etc
Polysaccharides
animal
Glycogen
plant
starch
cellulose
function
As the main source of energy for body activities
Cellulose is the main structure component of plant cell wall
Cellulose is the main structure component of plant cell wall
testing
reducing sugar
Benedict's reagent
Positive observation
brick red precipitate
negative observation/control group
stay blue
starch
iodine solution
negative observation/control group
yellow brown color
Positive observation
blue black color
lipids
molecular elements
C H O
classification
Triglycerides
function
store energy
reduces heat loss
protecrion
structure
1 glycerol
3 fatty acids
Steroids
cholesterol
necessary for animals, it helps build cell membrane, it is the precursor of hormones and VD
steroid hormones
.etc
Phospholipids
As the main component of cell membrane.
testing
ethanol emulsion test
Positive observation
white and opaque, like milk
negative observation/control group
remains transparent
1
protein
chemical elements
C H O N
composition unit
amino acids
H
-NH2
-COOH
-R
function
Structural Proteins
keratin
elastin
collagen,
.etc
Antibodies
Enzymes
Hormonal Proteins
insulin
oxytocin,
Transport Proteins
testing
biuret test
Positive observation
purple
negative observation/control group
blue
Nucleic acids
chemical elements
C H O N P
composition unit
nucleotides
phosphate
Nitrogenous base
purine
A
G
pyrimidine
T
C
U
pentose sugar
deoxyribose
ribose
testing for DNA
Diphenylamine
Positive observation
blue
negative observation/control group
transparent
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