Which of the following statements about the basic structural features of dna are true? select all true statements. select all true statements. the twisting of the dna double helix is attributed to the tight packing of dna bases and base-stacking. the major and minor grooves prevent dna binding proteins from making contact with nucleotides. the major and minor grooves form in the dna helix because the dna strands are antiparallel. in a dna macromolecule, the two strands are complementary and antiparallel.