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bacterial DNA replication

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How is the chromosome of a bacterial cell replicated?

a. the linear DNA molecules is replicated from multiple origins of replication bidirectionally.
b. the linear DNA molecule is replicated from one origin of replication bidirectionally
c. the circular DNA molecules is replicated from multiple origins of replication bidirectionally
d. the circular DNA molecule is replicated from one origin of replication bidirectionally
e. the circular DNA molecule is replicated from one origin of replication undirectionally

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This solution answers a multiple choice question relating to the replication of a bacterial chromosome.

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