alleryThe two strands of a DNA double helix are
Aparallel and right-handed
Bparallel and left-handed
Canti-parallel and right-handed
Danti-parallel and left-handed
Answer & Solution
Correct answer: C. anti-parallel and right-handed
Watson-Crick showed that the two strands run anti-parallel (one 5′→3′, the other 3′→5′) and coil in a right-handed spiral.
Pitch ≈ 3.4 nm, ~10 bp per turn.
Keep practising Genetics and Evolution
Browse all Genetics and Evolution questions for AP Intermediate 2nd Year, or explore more Biology topics.
Related questions
Genotype and phenotypeDominant or recessive?NEET · Bio · Principles of Inheritance · Mendel's LawsThe Miller-Urey experiment (1953) demonstrated that:The Human Genome Project (HGP) ran from 1990 to:The Lac Operon in E. coli is INDUCED (turned ON) by the presence of:The genotypic ratio in the F₂ of a monohybrid cross between Tt × Tt isDNA base pairing.