Question

Describe and explain how the structure of DNA results in accurate replication.

a) DNA strands are antiparallel, allowing for complementary base pairing during replication.
b) DNA strands are covalently bonded, preventing errors during replication.
c) DNA is a single-stranded molecule, making it easy to replicate.
d) DNA lacks the necessary enzymes for replication.

Answer 1

The structure of DNA results in accurate replication due to antiparallel DNA strands, complementary base pairing, and covalent bonding.

Step-by-step explanation:

The structure of DNA allows for accurate replication due to several key factors:

1. Antiparallel DNA strands: The two strands of the DNA double helix run in opposite directions (antiparallel), with one strand running in the 5' to 3' direction and the other in the 3' to 5' direction. This allows for complementary base pairing during replication, as the bases on one strand can pair with their complementary bases on the other strand.
2. Complementary base pairing: Adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G) through hydrogen bonding. This precise and complementary base pairing ensures that the correct nucleotides are added during replication, leading to accurate replication.
3. Covalent bonding: The two DNA strands are held together by covalent bonds between the sugar-phosphate backbones. These strong bonds prevent errors and maintain the stability of the DNA molecule during replication.