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DNA STRUCTURE AND REPLICATION

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

will not migrate
negative pole
none of these
positive pole

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

6500 kilobase
3000 kilobase
4500 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%?

Decreases
Remains same
Increases
Can not be compared

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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
50 to 60°C
60 to 80°C
70 to 90°C

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

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

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