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DNA Structure and Replication

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

semi-conservative replication
conservative replication
Cri du Chat
dispersive replication

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DNA Structure and Replication
DNA gyrase in E. coli

adds positive supercoils to chromosomal DNA
can be inhibited with antibiotics
is required only at the oriC site
performs the same function as helicase in eukaryotes

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DNA Structure and Replication
Deoxyribonucleoside triphosphates, being need in the chain termination methods are

dATP
dGTP and dCTP
all of these
dTTP

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DNA Structure and Replication
DNA can be sequenced by the

chain termination procedure
chemical method
both (a) and (b)
physical method

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DNA Structure and Replication
After one replication in 15N, how many bands should be observed in a cesium chloride gradient?

Two
One
A smear
Three

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DNA Structure and Replication
One hypothesis of DNA replication suggested that the parental DNA molecules are broken into fragments. Both strands of DNA in each of the daughter molecules are made up of an assortment of parental and new DNA. This statement refers to which hypothesis?

Evolutionary theory
Dispersive theory
Conservative theory
Semi-conservative theory

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