Scelta multipla
After DNA replication, how do the two resulting DNA molecules compare to each other?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
DNA is a self-replicating molecule. What structural feature of DNA accounts for its ability to replicate itself accurately?
A
The triple helical structure of DNA
B
Complementary base pairing between the two strands
C
The presence of ribose sugar in the backbone
D
Covalent bonds between nitrogenous bases
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Understand that DNA replication relies on the ability to create an exact copy of the molecule, which requires a mechanism for accurate pairing of nucleotides.
Recall the structure of DNA: it consists of two strands forming a double helix, where each strand is made up of nucleotides with nitrogenous bases.
Focus on the concept of complementary base pairing, where adenine (A) pairs specifically with thymine (T), and cytosine (C) pairs specifically with guanine (G).
Recognize that this complementary base pairing allows each strand to serve as a template for the formation of a new complementary strand during replication.
Conclude that the structural feature responsible for accurate self-replication is the complementary base pairing between the two strands, ensuring fidelity in copying the genetic information.
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