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DNA Structure and Replication

DNA Structure and Replication
Messelsen and Stahl model of replication was called

dispersive replication
semi-conservative replication
conservative replication
Cri du Chat

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DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

ligase
single stranded binding proteins
DNA helicases
DNA topoisomerase

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DNA Structure and Replication
DNAs when charged, migrate in a gel towards the

none of these
will not migrate
negative pole
positive pole

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DNA Structure and Replication
DNA polymerases I also has

5'-3' exonuclease activity
both (a) and (b)
3'-5'exonuclease activity
5'-3' endonuclease activity

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DNA Structure and Replication
Replication in E. coli is initiated by the generation of short RNA primers using

primase
both (a) and (b)
RNA polymerase
reverse transcriptase

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DNA Structure and Replication
What is the range of melting point temperatures (Tm) for most DNA molecules?

80 to l00°C
70 to 90°C
60 to 80°C
50 to 60°C

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