The four nitrogenous bases in DNA are adenine, guanine, cytosine, and thymine. They pair A-T, G-C and when transfering with RNA, A-U, which is known as Uracil, so, the pairs would be...
Two strands of DNA are held together by base pairing between complementary bases. adenine of one DNA strand pairs with thymine of other strand. Similarly, cytosine of one DNA strand pairs with guanine of other strand. Hence the complementary sequence for the following DNA strand would be:
