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DNA Structure and Replication

DNA Structure and Replication
An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called

transposase
helicase
reverse transcriptase
restriction endonuclease

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DNA Structure and Replication
DNA gyrase in E. coli

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

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DNA Structure and Replication
What is the exact name of the classical Watson-Crick double helix DNA?

X-DNA
Z-DNA
A-DNA
B-DNA

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DNA Structure and Replication
Each replication bubbles consists of

1 replication forks
4 replication forks
3 replication forks
2 replication forks

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DNA Structure and Replication
Okazaki fragments occur on the __________ and are bonded together by __________

Lagging strand, ligase
tRNA, polymerase
Leading strand, polymerase
mRNA, anticodons

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DNA Structure and Replication
Who's X-ray work aided Watson and Crick in their discovery of the double helix?

R. Franklin
W.H. Bragg
L. Pauling
Leaderberg

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