. The two strands in DNA are not identical but are complementary. Explain.
The two strands in DNA molecule are held together by hydrogen bonding, which is according to a specific rule. Adenine is bond thymine and guanine to cytosine. Due to this base pairing principle, the sequence of base in one strand automatically fixes the sequence of bases in the other strand.
Thus, the two strands are not identical but are complimentary.