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DNA Structure and Replication

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

DNA helicases
single stranded binding proteins
ligase
DNA topoisomerase

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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

none of these
helicase
DNA polymerase
strandase

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DNA Structure and Replication
Okazaki fragments occur during

synthesis
polymerase reaction
replication
transformation

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

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

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DNA Structure and Replication
DNA gyrase in E. coli

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

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

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

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