Because of the uneven distribution of electrons between hydrogen and oxygen atoms. This gives water molecule ‘ V-shape’. ( hydrogen bonding gives a strong cohesive forces )

Nucleic Acid C H O N P

NUCLEIC ACID

TEST PRESENCE OF STARCH ? Iodine solution ! Changes from brown to blue black if starch is present..

Nucleic Acid C H O N P

ESTER BONDS

CONDENSATION

Phospholipid bilayer forms basis of all cell membranes with its hydrophilic properties

COOH ! Carboxylic acid

NH2 Amine group

Available in human body

LINEAR SEQUENCE of amino acid

Example : INSULIN

FOLDEDTWISTED

Eg : DNA / RNA, keratin.

Eg : MYOGLOBIN ( in muscles ) , Antibody and Hormones.

Ionic, disulphide, hydrogen bonding.