Q. The nitrogen base found only in DNA is also called

 2404  202 KCETKCET 2015Molecular Basis of Inheritance Report Error

Solution:

Four nitrogen bases present in DNA are adenine, guanine, cytosine and thymine (= 5-methyl uracil). Thymine is present only in DNA and is absent in RNA, as in RNA, uracil is present in place of thymine.