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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance1 Mark
MCQ
DNA replication is aided by:
  • A
    DNA polymerase only
  • B
    DNA ligase only
  • C
    Both DNA polymerase and ligase
  • D
    RNA polymerase
✓

Answer

  1. Both DNA polymerase and ligase

Explanation:

DNA polymerase catalyes the formation of DNA strand. DNA ligase is otherwise called as molecular sutures. 5'→3' strand synthesis happens with the help of DNA Polymerase I. Synthesis of strand in 3' → 5' strand happens by the formation of okazaki fragments. These fragments are further joined together by the action of DNA ligase enzyme.

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