What did the structure of DNA's double helix suggest about DNA's properties?

• A. It implied that DNA was not involved in protein synthesis.
• B. It indicated that DNA could not store genetic information.
• C. It showed that DNA was composed of a single strand.
• D. It suggested a mechanism for DNA replication.

Answer: (D)

Verified step by step guidance

1. Understand the structure of DNA: DNA is composed of two strands that form a double helix. Each strand is made up of nucleotides, which include a phosphate group, a sugar molecule (deoxyribose), and a nitrogenous base.
2. Recognize the base pairing rules: In the double helix, the nitrogenous bases pair specifically (adenine with thymine, and cytosine with guanine) through hydrogen bonds. This complementary base pairing is crucial for the replication process.
3. Consider the implications of the double helix structure: The antiparallel nature of the strands and the specific base pairing suggest that each strand can serve as a template for the creation of a new complementary strand during replication.
4. Explore the replication mechanism: During DNA replication, the double helix unwinds, and each strand acts as a template for the synthesis of a new strand. This ensures that genetic information is accurately copied and passed on to daughter cells.
5. Conclude the significance: The structure of the double helix directly implies a mechanism for DNA replication, allowing for the precise duplication of genetic material, which is essential for cell division and inheritance.