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DNA Structure and Replication

DNA Structure and Replication
The most common liquid volumes in molecular biology are measured in

nl
ml
μl
1

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DNA Structure and Replication
For the DNA replication in eukaryotes, the cell cycle consists of

S, G2 and M phases
G1,S, G2 and M phases
G1, G2 and M phases
G2 and M phases

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DNA Structure and Replication
An RNA primer is synthesized by

primase
DNA topoisomerase
ligase
DNA helicases

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DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

DNA topoisomerase
single stranded binding proteins
DNA helicases
ligase

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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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DNA Structure and Replication
DNA gyrase in E. coli

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

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