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Molecular Basis Of Inheritance

Question
CBSEENBI12003265

DNA replication generally proceeds in a 

  • 3 direction

  • 5 direction

  • 3 direction

  • 5 direction

Solution

A.

3 direction

DNA is made up of double helix of two complementary strands. Both the strands get seperated during replication. Each strand of the original DNA molecule then serves as a template for the production of its counterpart, hence, a process is known as semi- conservative replication.

DNA synthesis or replication always proceeds in 5' 3' direction because DNA polymerase acts on the 3'- OH of the existing strand for adding the free nucleotides.