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DNA Structure and Replication

DNA Structure and Replication
What is the IUPAC code for an A, C, T ambiguity in a nucleic acid sequence?

H
B
S
None of these

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DNA Structure and Replication
Each replication bubbles consists of

1 replication forks
4 replication forks
3 replication forks
2 replication forks

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

H-NS
HU
HSP-1
All of these

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

Saccharomyces cerevisiae
Xenopus laevis
Arabidopsis thaliana
Strongylocentrotus purpuratus

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DNA Structure and Replication
What is the only common methylation in the DNA of eukaryotes?

None of these
Adenosine in GpA dinucleotides
Cytosine in CpG dinucleotides
Guanosine in ApGpA trinucleotides

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DNA Structure and Replication
A cesium chloride will separate DNA molecules by

absorption
density
adhesion
resorption

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