Page 7 - Lesson Notes - Biomolecules 1

Some tissue have complex structure of lipids, e.g., Neural tissues.
(b) Oils are usually liquid at room temperature because they have low melting point,
e.g., groundnut (peanut) oil, cotton seed oil, mustard oil, etc.
As oils have low melting points. They remain as oils in winters also, e.g., Gingely oil.

iii. Derived Lipids
These are lipid-like substances such as sterol or derivatives of lipids, e.g., steroids,
prostaglandins and terpenes.
Fats are also differentiated into two main types, on the basis of their melting points
at room temperature as follows
(a) Hard Fats are solids at room temperature and contain long chains of fatty acids,
e.g., Animal fat.
Softness of butter is due to the good quantity of short chain fatty acid it contains.
4. Nucleotides
These are the monomers of nucleic acids.The nucleotides are made up of three
molecules, i.e., a pentose sugar, a cyclic nitrogenous base and a phosphoric acid
(phosphate group), e.g., Adenylic acid, thymidylic acid, guanylic acid, uridylic acid
and cytidylic acid.