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What is the function of each of the following? 6.  Topoisomerase 7.  Helicase 8.  Ligase 9.  Ribosome 10.  Telomerase 11.  Primase 12.  How...

What is the function of each of the following?

6.  Topoisomerase

7.  Helicase

8.  Ligase

9.  Ribosome

10.  Telomerase

11.  Primase

12.  How many of the molecules listed above are used only in replication?    

13.  How many of the molecules listed above are used both in transcription and replication?

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Answer #1

6. Relaxes the supercoiling which occurs ahead of the replication bubble during DNA replication.

7. Responsible for the unwinding of DNA double helix into single stranded template DNA molecules.

8. Responsible for the formation of phosphodiester bond between adjacent okazaki fragments on the lagging strand.

9. Responsible for scanning the Messenger RNA for start codon and keep messenger RNA and transfer RNA in Association with each other during translation.

10. Responsible for the addition of repetitive sequences at the tips of linear chromosomes in eukaryotes and solve and replication problem.

11. Responsible for the formation of RNA primer during DNA synthesis.

12. Five (6, 7, 8, 10, 11)

13. Helicase only

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