[问答题]
4. Label the following parts of DNA on the)nm j iihm67f6 diakc3g8;ev0lqfyr2 9qd gram of DNA shown below. (5 marks)
32q 9l0y;qk frg d8vec (a) Hydrogen bond
(b) Covalent bond
(c) Nitrogenous base
(d) Deoxyribose sugar
(e) A single nucleotide (by drawing a circle encompassing a single nucleotide)