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DNA Structure and Replication

DNA Structure and Replication
The DNA polymerase in bacteria, responsible for DNA synthesis is

Polymerase I
all of these
Polymerase III
Polymerase II

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

Dehydration
Formation of thymine dimers
Depurination
Single strand break

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DNA Structure and Replication
DNA gyrase in E. coli

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

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DNA Structure and Replication
DNA helicase is used to

None of these
unwind the double helix
break a phosphodiester bond in DNA strand
interact the double helix closely

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DNA Structure and Replication
Which DNA polymerase removes RNA primers in DNA synthesis?

Polymerase I
Polymerase III
Polymerase II
none of these

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

Strongylocentrotus purpuratus
Xenopus laevis
Arabidopsis thaliana
Saccharomyces cerevisiae

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