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  • Read the following statements w.r.t DNA polymerase in prokaryotes: 1. DNA polymerase III is a repair enzyme 2. The 5′ to 3′ exonuclease activity of DNA Pol. I remove basep

Read the following statements w.r.t DNA polymerase in prokaryotes:
1. DNA polymerase III is a repair enzyme
2. The 5′ to 3′ exonuclease activity of DNA Pol. I remove basepaired sequences ahead of the polymerizing activity. 
3. Pol III synthesizes DNA at least a hundred times more rapidly than the other polymerases.
4. DNA Pol II has 5′ to 3′ exonuclease activity.

 Which statement is/are incorrect?
 

Option: 1

1, 2 & 3
 


Option: 2

2, 3 & 4
 


Option: 3

2 & 4
 


Option: 4

3 & 4
 


Answers (1)

best_answer

As we have already discussed in Enzymes Involved In DNA Replication -

DNA Pol III is the actual replication enzyme. The 5′ to 3′ exonuclease activity of DNA Pol. I remove base?paired sequences ahead of the polymerizing activity. Pol III synthesizes DNA at least a hundred times more rapidly than the other polymerases. Pol II has the same editing (3′ to 5′) activity as Pol I, but not the 5′ to 3′ exonuclease activity.
Hence the correct option is (c).

Posted by

Rishi

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