Microbiology True about DNA structure: (PGI Nov 2010) A Purines are adenine and guanine ; pyrimidines are uracil and cyTosine B Watson and Crick discovered structure in 1973 C Doxyribose-phosphate backbone with bases stacked inside D Mainly consists of left handed helix 💡 Explanation True about DNA structure: (PGI Nov 2010) ✓ Correct Answer: C. Doxyribose-phosphate backbone with bases stacked inside