A) its charged phosphate groups
B) the formation of hydrogen bonds between bases from opposite strands
C) the opposite direction of the two strands
D) the pairing of bases on one strand with bases on the other strand
Correct Answer: C
Solution :
DNA is a long chain polymer of nucleotides. It has a double helical structure and the two helices are antiparallel (ie, two polynucleotide chains run in opposite direction) and complementary.
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