question_answer 1)

    In a DNA strand the nucleotides are linked together by (a) glycosidic bonds                                                         (b) phosphodiester bonds (c) peptide bonds                                                            (d) hydrogen bonds

Answer:

                      (b) (In a DNA strand the nucleotides are linked together by 3'-5' phosphodiester linkage(bonds) to form a dinucleotide. More nucleotides can be joined in such a manner to form a polynucleotide chain.