AP BIOLOGY

Detailed explanation-1: -The correct option is C The complementary DNA strand of the sequence ATGC will be TACG. The complementary base pairing in DNA is as per the Chargaff’s rules.

Detailed explanation-2: -DNA is always synthesized in the 5’-to-3’ direction, meaning that nucleotides are added only to the 3’ end of the growing strand.

Detailed explanation-3: -The sequence of the mentioned DNA strand is 5’-ATCAGC-3’. So, the sequence of the complementary strand will be 3’-TAGTCG-5’.

Detailed explanation-4: -Two strands of complementary sequence are referred to as sense and anti-sense. The sense strand is, generally, the transcribed sequence of DNA or the RNA that was generated in transcription, while the anti-sense strand is the strand that is complementary to the sense sequence.