Question

Put the following steps of binary fission in order, from earliest to latest events

I Elongation of the cytoplasmic membrane
II formation of cross wall
III replication of cellular DNA

A) II, I, III
B) II, III, I
C) I, III, II
D) III, I, II
E) III, II, I

Answer 1

In binary fission, DNA replication occurs first, followed by cell elongation, and then the formation of a cross wall, making the correct order D) III, I, II.

Step-by-step explanation:

The correct order for the steps of binary fission from earliest to latest events is: replication of cellular DNA, elongation of the cytoplasmic membrane, formation of cross wall. In binary fission, replication of the circular prokaryotic chromosome begins at the origin of replication and proceeds in both directions. After DNA replication, the cell elongates and the DNA molecules separate. Finally, a cross wall forms completely, leading to the separation into two daughter cells.

Therefore, the answer is D) III, I, II.