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DNA STRUCTURE AND REPLICATION

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

positive pole
negative pole
will not migrate
none of these

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DNA Structure and Replication
What is the approximate size (in kb) of the E. coli genome?

4500 kilobase
3000 kilobase
6500 kilobase
5500 kilobase

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DNA Structure and Replication
In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Remains same
Can not be compared
Decreases
Increases

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

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

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DNA Structure and Replication
The overall conclusion of the Hershey-Chase experiment was that

DNA was responsible for heredity
proteins and DNA were responsible for heredity
phage DNA was similar to bacterial DNA
the ratio of Adenine to thymine was always the same

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