Both strands of dna double helix can serve as templates for the synthesis of ide

Question

Both strands of dna double helix can serve as templates for the synthesis of identical new dna strands because:

A) the ratios of adenine to thymine and guanine to cytosine in each strand is always 1.0.

B) each strand is complamentary to the other, therefore, a new strand constructed using either strand of the original dna as a template will result in an exact copy of the original double helix.

C) each strand is exactly alike, they are only oriented antiparallel to each other.

D)each strand is exactly alike, therefore, a new strand constructed using either strand of the original dna as a template will result in an exact copy of the original double helix.

E) both c and d

Explanation / Answer

It's B. DNA replication occurs mainly because they have complementary bases. Thus, the whole strand is also complementary with the other, and once it replicates, it's also complementary which makes it 'look' like the original DNA.

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