Genetic code The relation between the amino acid and the nucleotide triplet is called genetic code .
Codons The nucleotide bases in RNA function in groups of three ( triplet ) in coding amino acids . These base triplets are called codons .
The world code is used with reference to DNA , codon with reference to m- RNA and anticodon with reference to t-RNA .
Lipids
The constituents of animals and plants soluble in organic solvents ( ether , chloroform . carbon tetrachloride ), but insoluble in water are called lipids . ( Greek lipose = fat )
Types of Lipids ( i ) Simple lipids ( a ) Fats and oils on hydrolysis give long chain fatty acids + glycerol . ( b ) Waxes Long chain fatty acids + long chain alcohols .
Vegetable and animal oils and fats have similar chemical structure and are triesters of glycerol , called glycerol .
Simple glycerides contain one type of fatty acids . Mixed glycerides contain two or three types of fatty acids .
Common saturated fatty acids CH3- ( CH2 ) nCOOH .
When n = 4 caproic acid ; n = 6 caprylic acid ; n = 8 capric acid , n = 10 lauric acid n = 12 myristic acid ; n = 14 palmitic acid , n = 16 stearic acid .