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Which mode of plasmid replication involves only one replication fork? Unidirectional theta replication Bidirectional theta replication...

Which mode of plasmid replication involves only one replication fork?

  1. Unidirectional theta replication
  2. Bidirectional theta replication
  3. Rolling circle replication
  4. More than one but not all of the above
  5. None of the above.
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Answer #1

Answer - D. More than one but not all of the above

Explanantion - Replication fork is decides the direction of replication. In case of bidirectional theta replication, two replication fork formed which move in opposite direction and meets at the diametrically opposite site completing the replication process.

While unidirectional theta replication and rolling circle mechanism involves one replication fork which moves in one direction and ultimately reaches the point from where replication begins resulting in completion of replication.

Therefore, option A. unidirectional theta replication and option C. rolling circle mechanism is the mode of plasmid replication involves only one replication fork.

Hence, the correct option is option D.More than one but not all of the above.

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