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DNA Structure and Replication

DNA Structure and Replication
Telomeres are usually rich in which nucleotide?

Guanine
Cytosine
Thymine
Adenine

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

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

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DNA Structure and Replication
The nicks or gaps between Okazaki fragments are eventually sealed by

DNA ligase
RNA ligase
gyrase
polymerase

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

B
S
None of these
H

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DNA Structure and Replication
In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called

pyrimidines
All of these
purines
protamines

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DNA Structure and Replication
DNA helicase is used to

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

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