Question

during dna replication in a human cell, 6 billion bases must be paired properly. which characteristic of dna best allows for high levels of accuracy during this process? single - helix shape base pairing according to certain rules presence of ribose in the backbone ion channels

Explanation:

• Analyze each option:
• "single - helix shape": DNA is a double - helix, so this is incorrect.
• "base pairing according to certain rules": DNA follows specific base - pairing rules (A - T, G - C). During replication, the template strand's bases pair with new bases following these rules, ensuring accuracy.
• "presence of ribose in the backbone": DNA has deoxyribose, not ribose (ribose is in RNA), so this is incorrect.
• "ion channels": Ion channels are related to cell membranes and ion transport, not DNA replication accuracy, so this is incorrect.

Answer:

B. base pairing according to certain rules