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DNA Structure and Replication

DNA Structure and Replication
What is the name given to the points at which a DNA helix is unwound and new strands develop?

Okazaki fragments
Leading strands
Replication origins
Replication forks

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

pyrimidines
protamines
purines
All of these

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DNA Structure and Replication
DNA gyrase in E. coli

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

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DNA Structure and Replication
DNAs when charged, migrate in a gel towards the

negative pole
none of these
will not migrate
positive pole

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DNA Structure and Replication
The chromosomal DNA complexes with

three types of histone as H1, H2A and H4
five types of histone as H1, H2A, H2B, H3 and H4
four types of histone as H1, H2A, H3 and H4
two types of histone as H1 and H4

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

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

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