question_answer 21)

  An add soluble compound formed by phosphorylation of nucleoside is called (a) nitrogen base              (b) adenine                        (c)sugar phosphate                   (d) nucleotide                  

Answer:

                (d) Each nucleoside is made up of cyclic nitrogenous base, purine or pyrimidine and apentose sugar. On phosphorylation, it forms a nucleotide i'.e., a. molecule 'with ,-nitrogenous- basepentose sugar and three phosphate groups,