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DNA Structure and Replication

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

purines
All of these
protamines
pyrimidines

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DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

nickase activity
exonuclease activity
endonuclease activity
no activity

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DNA Structure and Replication
Which of the following in DNA replication and transcription are common?

incorporation of deoxynucleotides
None of these
utilization the same enzyme
synthesis in the 5'-3' direction

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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
Guanosine in ApGpA trinucleotides
Cytosine in CpG dinucleotides

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DNA Structure and Replication
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

helicase
DNA polymerase
none of these
strandase

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DNA Structure and Replication
Overwinding or overtightening of DNA during replication is caused and removed by

DNAa, gyrase
DNAb, DNA polymerase
Single stranded protein, DNAa
DNAb, gyrase

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