Question

Nucleosides form one of the precursor in the formation of the genetic material within the living system. What is the composition of nucleoside?

• A. Five carbon sugar molecule, nitrogen base only
• B. Six carbon sugar molecule, nitrogen base only
• C. Six carbon sugar molecule, nitrogen base and phosphate group only
• D. Five carbon sugar molecule, nitrogen base, and amino acids only

Answer 1

Answer: (A)

Nucleosides are carbon compounds found in the cell which are made of 5C pentose sugar and one of the four N-bases. When to this molecule a phosphate group is attached, it is called as nucleotide. Nucleoside is generally made in the liver which is later changed to nucleotide helping in the formation of DNA and RNA. DNA forms the genetic material in the cell.