Which of the following accurately describes the structure of dna? a. a always pairs with c, and g always pairs with t. b. dna consists of four bases: a, g, c, and u. c. dna is made up of nucleotides, containing a 3-carbon sugar, a phosphate group, and base. d. dna is in the form of antiparallel strands twisted as a double helix.

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Which of the following accurately describes the structure of dna? a. a always pairs with c, and g always pairs with t. b. dna consists of four bases: a, g, c, and u. c. dna is made up of nucleotides, containing a 3-carbon sugar, a phosphate group, and base. d. dna is in the form of antiparallel strands twisted as a double helix.

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Among the options given, the one that most accurately describes the structure of DNA is D. DNA is in the form of anti-parallel strands that are twisted like a double helix. Moreover, DNA is composed primarily of nucleotides composed of a nitrogenous base, at least one phosphate group, and a five – carbon sugar. It should also be noted that adenine purine (A) is not paired with thyrine pyrimidine (T) and guanine purine (G) with cytosine pyrimidine (C).