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DNA STRUCTURE AND REPLICATION

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

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

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DNA Structure and Replication
How does ethidium bromide interact with DNA?

It binds to phosphate
It binds to adenine
It intercalates between bases
It does not interact

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DNA Structure and Replication
Number of times the two DNA strands are interwined in circular DNA and is known as

helix frequency
none of these
linking number
twisting number

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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
none of these
DNA polymerase
strandase

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

Saccharomyces cerevisiae
Xenopus laevis
Strongylocentrotus purpuratus
Arabidopsis thaliana

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