Final answer:
The correct structure is the one that follows DNA's anti-parallel nature and complementary base pairing. Adenine pairs with thymine, and cytosine pairs with guanine. The correct answer, considering the erroneous options, is option d.
Step-by-step explanation:
Given the information about the anti-parallel nature of DNA, we can determine that the possible structure must adhere to the established principles of DNA architecture. DNA consists of two strands that run in opposite directions, which is referred to as being anti-parallel. One strand runs in a 5' to 3' direction, while the complementary strand runs in a 3' to 5' direction.
Additionally, the nitrogenous bases pair specifically where adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). This is known as complementary base pairing, which is crucial for the structural integrity of DNA.
Given the options from the materials provided, the option mentioning adenine pairing with thymine and cytosine pairing with guanine, as well as sugar contributing to the DNA structure, is the most accurate representation of DNA's structure.
Therefore, the correct statement about DNA structure is option d, which describes the DNA strands as being anti-parallel, with specific base pairing and sugar as part of the backbone. The presence of uracil is incorrect as it is found in RNA, not DNA, and statements suggesting adenine pairing with cytosine or the strands being parallel are not consistent with the established DNA model.