Simulation · Biology · Class 11
Nucleoside or nucleotide?
From the lesson Nucleic acids in Biomolecules. Change the values and watch what happens.
Nucleoside or nucleotide?Biology · Class 11
The idea behind it
NCERT §9.6
- Nucleic acids, the remaining macromolecule of the acid-insoluble fraction, are polynucleotides.
- Polysaccharides, polypeptides and polynucleotides together make up the true macromolecular fraction of a tissue or cell.
- The building block is the nucleotide, with three chemically distinct parts: a heterocyclic compound (the nitrogen base), a monosaccharide (the sugar) and phosphoric acid (phosphate).
- Five bases occur: adenine, guanine, cytosine, thymine and uracil. Of these, adenine and guanine are substituted purines, and the other three are substituted pyrimidines.
- The sugar is either ribose or 2' deoxyribose, both pentoses. A nucleic acid with deoxyribose is deoxyribonucleic acid (DNA); one with ribose is ribonucleic acid (RNA).