The structure of DNA is characterized by a (a) right-or-left-handed double helix and antiparalle...

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The structure of DNA is characterized by a
(a) right-or-left-handed double helix and antiparallel strands
(b) right-handed double helix and antiparallel strands
(c) right-handed single helix
(d) right-handed single helix and parallel strands
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