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DNA STRUCTURE AND REPLICATION

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

will not migrate
positive pole
none of these
negative pole

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

3000 kilobase
5500 kilobase
6500 kilobase
4500 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%?

Increases
Decreases
Can not be compared
Remains same

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

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

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

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

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