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DNA Structure and Replication

DNA Structure and Replication
The DNA is negatively super coiled, complexes to histone,

H-NS
HU
All of these
HSP-1

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DNA Structure and Replication
What is the main damaging effect of UV radiation on DNA?

Dehydration
Depurination
Formation of thymine dimers
Single strand break

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DNA Structure and Replication
DNA gyrase in E. coli

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

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DNA Structure and Replication
The accepted hypothesis for DNA replication is

evolutionary theory
semi-conservative theory
dispersive theory
conservative theory

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DNA Structure and Replication
Enzyme, responsible for proofreading base pairing is

DNA ligase
DNA polymerase
Primase
Telomerase

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DNA Structure and Replication
Which of the following species lack a 'classical' histone H1?

Xenopus laevis
Saccharomyces cerevisiae
Strongylocentrotus purpuratus
Arabidopsis thaliana

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