What are the subunits of a typical nucleotide?
Each nucleotide is made of three subunits:
- a 5-carbon monosaccharide (a pentose sugar)
- a nitrogen-containing base
- a phosphoric acid
What pentose sugar is found in nucleotides? (OR How ribonucleotide and deoxyribonucleotide differ in having pentose sugar?)
Pentose sugar in ribonucleotide is ribose, while in deoxyribonucleotide it is deoxyribose (one oxygen removed from OH group at carbon number
What nitrogenous bases are present in nucleic acids?
Nitrogenous bases are of two types:
- single-ringed pyrimidines
- double-ringed purines
Pyrimidines are cytosine (abbreviated as C), Thymine (abbreviated as T), and uracil (U). Purines are adenine (A) and guanine (G).
What is the position of attachment of nitrogenous base and phosphoric acid to pentose sugar in a typical nucleotide?
In a typical nucleotide the nitrogenous base is attached to position 1 of pentose sugar, while phosphoric acid is attached to carbon at position 3 of pentose sugar.
Differentiate between nucleoside and nucleotide.
The compound formed by combination of a base and a pentose sugar is called nucleoside while a nucleoside and a phosphoric acid combine to form a nucleotide.