Question

How does the complementary pairing of bases allow both strands of a DNA molecule to contain the same information?

Answer 1

The complementary pairing of bases in DNA allows both strands to contain the same information through the base complementary rule.

Step-by-step explanation:

The complementary pairing of bases in DNA allows both strands of the molecule to contain the same information by following the base complementary rule. In DNA, adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).

For example, if the sequence of one DNA strand is 5'-AATTGGCC-3', the complementary strand would have the sequence 3'-TTAACCGG-5'.

This complementary base pairing allows for accurate DNA replication, where each strand acts as a template for the creation of a new strand with complementary base pairs. As a result, the daughter DNA molecule contains the same information as the parental molecule.

Answer 2

Step-by-step explanation:

During replication, the double stranded helix of DNA is unwinded and unzipped by helicase. Polymerase cannot just start adding nucleotide to the strand so DNA primase synthesizes a short strand of nucleotide called primers, then the enzyme polymerase can now start the additional of free nucleotide. The enzyme polymerase adds free complementary nucleotide to the leading strand in 3' to 5' and the same is done for the lagging strand. The new daughter complementary strand formed on the leading strand is identical to the parent lagging strand and the new daughter complementary strand formed on the lagging strand is identical to the parent leading strand, so a pair of identical daughter double stranded DNA or two identical daughter double stranded DNA are formed.