The two strands of the DNA molecule bind to each other by base pairing: the bases of one strand pair with the bases of the other strand. Reading from 5′− to- 3′, the upper sequ...The two strands of the DNA molecule bind to each other by base pairing: the bases of one strand pair with the bases of the other strand. Reading from 5′− to- 3′, the upper sequence begins ’GTGCACCTG...’, while the lower sequence ends’...CAGGTGCAC’. Here, only the upper sequence codes for the human hemoglobin beta chain, and the lower sequence is non-coding.
