BIOMOLECULES AND ENZYMES

Detailed explanation-1: -mRNA is formed as a complementary strand to one of the two strands of the DNA. Three of the four nitrogenous bases that make up RNA-adenine (A), cytosine (C), and guanine (G)-are also found in DNA. In RNA, however, a base called uracil (U) replaces thymine (T) as the complementary nucleotide to adenine.

Detailed explanation-2: -The preferential binding of bases A to T (or U) and C to G in DNA or RNA. For example, if there is a GTC on the DNA strand, the complementary RNA or DNA sequence will be CAG. This complementarity maintains the double helical structure of DNA.

Detailed explanation-3: -If one strand of a DNA molecule has the sequence of bases 5’ATTGCA3’, the other complementary, antiparallel strand of DNA would have the sequence: 5’TGCAAT3’.

Detailed explanation-4: -Step 1: Starting on the left, read the first letter in the DNA sequence and write down the complementary base. The first base in this sequence is “A", which pairs with “T", so the first letter in our complementary sequence will be “T". Step 2: Continue from left to right until the complementary sequence is complete.