Question

DNA replication in bacteria occurs:
A) Within nucleolus
B) Prior to fission
C) Just before transcription
D) During S phase

Answer 1

Hint:Bacteria are small microscopic organisms which can live both inside and outside a host They are single celled organisms and have the capacity to survive even under harsh conditions.

Complete answer:
Let us first know a little about DNA replication before we find the correct option. The process by which DNA makes multiple copies of itself is known as DNA replication. The process of replication is an enzyme catalysed process and involves various enzymes like - DNA polymerase and DNA ligase.
Option A: The nucleolus of bacteria is involved in rRNA synthesis and also in ribosome biogenesis. But DNA replication does not start in it, therefore, this is the incorrect option.
Option B: DNA replication happens before fission. Fission is the process by which the bacteria duplicates its genetic material. Therefore, this is the correct option
Option C: DNA replication happens along with DNA transcription. Therefore, this is the incorrect option.
Option D: In prokaryotes, the S-phase is not well marked as it is a primitive organism. Therefore, this is the incorrect option.

Additional information:The various steps involved in DNA replication are,
>First the helix is uncoiled
>Then strand separation happens by breaking of hydrogen bonds between the complementary strands
>Lastly, by complementary base pairing synthesis of two new strands is seen

Note:On contrary, in humans, the DNA replication happens inside the nucleus of the cell. It happens in the interphase stage of the cell division.