Multiple choice

The DNA strands are antiparallel because of A. orientation of nitrogenous bases B. phosphodiester bonds C. orientation of sugar and phosphate molecules D. structure of the deoxyribose sugar E. hydrogen bonds

  1. B and D

  2. B, C and D

  3. Only A

  4. A, B and E
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The antiparallel nature of DNA molecule is primarily due to structure of deoxyribose sugar (it lacks an oxygen at 2') that causes the difference in chemical polarity and the directionalism of phosphodiester bonds makes the polarity zero.

Keep practicing — related questions