Biomolecules Test - 2

Oils have lower melting point (e.g., gingely oil) and hence remain as oil in winters.

Arachidonic acid has 20 carbon atoms including the carboxyl carbon. Molecular formula- C₂₀H₃₂O_2.

Based on number of amino and carboxyl groups, there are acidic (e.g., glutamic acid), basic (lysine) and neutral (valine) amino acids. Similarly, there are aromatic amino acids (tyrosine, phenylalanine, tryptophan).

Side chains which have pure hydrocarbon alkyl groups (alkane branches) or aromatic (benzene rings) are non-polar. Examples include valine, alanine, leucine, isoleucine, phenylalanine.

Some lipids have phosphorous and a phosphorylated organic compound in them. These are phospholipids. They are found in cell membrane.

The cell wall of fungi is made of chitin,complex sugar molecules. The cell wall of plants are made up of cellulose.

Hydrolysis of nucleic acid (DNA and RNA) produces pentose sugar ( ribose or deoxyribose) purine and pyrimidine. Phosphoric acid is not released on hydrolysis of DNA or RNA.

Enzymes are bio-catalyst. All the metabolic biochemical reactions are carried out with the help of enzyme. No cell could survive without enzyme.

Cellulose is the most abundant organic molecule present on earth. Cellulose forms the cell wall of all plant cells. Cell wall is the outermost protective layer of cell.