Q 45. - Biology

Question

Describe how the duplicated bacterial chromosomes are distributed into new daughter cells without the direction of the mitotic spindle.

Step-by-Step Solution

Answer

Chromosomes are joined to the plasma membrane through protein and it moves when the plasma membrane grows as the cell elongates. As Chromosome is being replicated, DNA moves away from the origin point from where replication started.

Step 1. Introduction

Bacterial chromosomes are joined to protoplasm at the midpoint of the cell. The origin that is a site of replication is present near the binding site of the chromosome to the plasma membrane. DNA duplication or replication is bidirectional, moves away from the origin toward both strands at the same time.

Step 2. Explanation

As the new double strands of DNA are created, each point moves Away from the attachment point in the cell toward the opposite pole or ends of the cell. As a result, when the cell elongates and membrane grow it helps in the transport of the chromosomes without the formation of the spindle.